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Volume 135, Number 12 Friday, April 17, 2015

VIVIAN HU!THE TECH Simmons Hall residents covered windows of the dorm to spell out “CPW,” marking the start of Campus Preview Weekend yesterday.

Five of six top Putnam math CPW events not permitted contest scorers are from MIT MIT took !rst place in the competitors from &(( schools. between ! and " a.m. this year "#$% William Lowell Putnam )e Putnam test, which Mathematical Competition, began in $,*+, has $" prob- Ban has been Institute policy since the ’!"s, but some results for which were recently lems and lasts for six hours. It released. Five MIT individuals emphasizes speed, unlike the also received the Putnam Fel- mathematical research con- students worry it will detract from ‘MIT experience’ lowship, which was awarded to ducted at institutions like MIT. By Amy Wang an email to the Dormitory Council. Eli H. Ross ’$% wrote that the ad- the top six scorers. “Class at MIT didn’t help much STAFF REPORTER Freeman referred "e Tech to Dean ministration had planned on enforc- Zipei Nie ’$&, Mitchell M. directly; the Putnam doesn’t of Admissions Stuart Schmill ’+'. ing the policy last year during his Lee ’$', and David H. Yang ’$( cover any super-advanced MIT is not permitting events be- “Given that we are hosting about tenure as DormCon president, but made up the !rst-place-win- math, so I knew all the theory tween $ a.m. and ' a.m. during this a thousand high schools students on ultimately did not. Describing what ning team, and Nie, Yang, Mark needed before coming here,” year’s Campus Preview Weekend. our campus, ending formal events happened last year, he said that “the Sellke ’$(, Bobby Shen ’$(, and Sellke said. )e policy will be enforced in or- at $ a.m. seems like the right thing policy choice was made and then Lingfu Zhang ’$( were Fellows. )e exam is known for be- der to bring CPW into compliance to do,” Schmill said. “I do not think simply relayed to relevant groups.” )ese six were among the *" ing di-cult. )e median for this with Institute policy, which states the pre-frosh perception of MIT or of Students argued that they were told MIT students placing in the top that all campus events must end by CPW will change.” about the ban too late to adjust their +,, all in an overall pool of %,*"# Putnam, Page 16 $ a.m. Exceptions may be granted Institute policy has prohibited programming, so the ban was not by the CPW Events Review Commit- events after $ a.m. since the $,,#s, enforced. tee “if there is a compelling reason but due to a lack of communication )e administration also agreed the event cannot be held prior to $ between the Student Activities Of- to allow MIT students to serve on the REPORTER’S NOTEBOOK [a.m.].” !ce (SAO) and the CPW Events Re- CPW Advisory Committee, which Dean for Undergraduate Educa- view Committee, the committee has had previously only consisted of tion Dennis M. Freeman was behind inadvertently ignored the ban and MIT sta.. the change, Assistant Director of approved events at all hours in pre- Sharma resigns amid Admissions Katie A. Kelley said in vious years. CPW, Page 18 parliamentary pablum A lighter take on the UA’s shake-up By Austin Hess o-ce within a week of their elec- SENIOR EDITOR tion. Davis said he learned of the pending transfer Monday at $$ p.m. “And let’s get to work!” an- Sharma ended her term with a nounced Matthew J. Davis ’$' at speech in which she thanked the the conclusion of his !rst speech councillors for their “trust and sup- as president of the Undergraduate port” during her term. It was unclear Association. )e rare half-second whether the council, which had vot- pauses in his delivery would have ed $%-*-$ in a narrowly unsuccessful likely been polished out had he bid to trigger her recall two weeks had an extra month to prepare for prior, felt similarly. the moment, but no such luck — “If you want to go fast, go alone. embattled former president Shruti If you want to go far, go together,” Sharma ’$& resigned a month early Sharma quoted in a reverent allu- during Wednesday’s UA Council sion to her high school valedictory meeting, sweeping him and vice president-elect Sophia Liu ’$( into UA, Page 16

April !" to April !#. IN SHORT MIT will be closed for Patriot’s Drop date is next %ursday, Day next Monday, April !". Tues- April !&. $is is the last day to drop day, April !" is also an Institute classes or switch to listener status. holiday. Send news and tips to news@ JESSICA L. WASS!THE TECH MIT Earth Days !"#$ are from tech.mit.edu. A hack appeared in Lobby 7 early Monday morning. Ribbons of black and orange planes spelled out “DTYD,” publicizing the annual party by the same name to be hosted by the Burton Third Bombers this upcoming Sunday.

THIS WEEK’S GAME OF THRONES SEUSSICAL ANSWERING A SECTIONS Weather ...... 2 MATH PUZZLES A slow start, but you can feel the mo- The author and illustra- SEXUAL ASSAULT Opinion ...... 4 Try your hand. mentum building. ARTS, p. 12 tor’s most beloved works, HOTLINE Fun Pages ...... 5 on stage at Next House. FUN, p. 7 DAREDEVIL Arts ...... 12 PHOTO, p. 10–11 Why I don’t get too Campus Life . . . .13 Netflix meets Marvel. ARTS, p. 12 brought down. Sports ...... 20 CAMPUS LIFE, p. 13 ! T!" T"#! F$%&'(, A)$%* +,, -.+/

WEATHER

After brief round of 130°W 125°W 120°W 115°W 110°W 105°W 100°W 95°W 90°W 85°W 80°W 75°W 70°W 65°W 60°W 40°N showers, beautiful 1009

1023 EATHER weekend in store 35°N

W By Casey Hilgenbrink ing a washout, though — any STAFF METEOROLOGIST showers should clear out by around lunchtime, leaving 0is week, Bostonians have plenty of time for outdoor ac- been reminded of how nice tivities in the afternoon. 0e it is to be above average in weekend looks beautiful, with 1020 30°N something that isn’t snowfall! plenty of sunshine and a high Since Sunday, we’ve enjoyed in the upper 1.s°F and upper 1009 1015 daily high temperatures /–+.°F /.s°F on Saturday and Sunday, above average and abundant respectively. Looking ahead to sunshine, with more on the Marathon Monday, if you’re 25°N way this weekend. headed to Copley Square to First, though, we’ll likely cheer on runners as they cross

EATHER have to deal with a little rain, the 2nish line, consider bring- thanks to some showers as- ing an umbrella — rain, gusty sociated with a cold front winds, and a high in the low approaching from the west. /.s°F all appear likely Monday

W Don’t worry about CPW be- afternoon.

Extended Forecast Situation for Noon Eastern Time, Friday, April 17, 2015 Weather Systems Weather Fronts Precipitation Symbols Other Symbols Today: Cloudy with west winds at 10–15 mph and gusts up Snow Rain Fog High Pressure Trough to 30 mph. High 65°F (18°C). Showers Thunderstorm Tonight: Decreasing clouds with west winds at 5–10 mph. Warm Front Light Low Pressure Haze Low 52°F (11°C). Cold Front Tomorrow: Mostly sunny with west winds around 5 mph. Moderate Compiled by MIT Hurricane Meteorology Staff Stationary Front Heavy High 69°F (21°C). and The Tech Sunday: Sunny. High upper 50s °F (15°C). EATHER EATHER W EATHER EATHER W EATHER EATHER W EATHER EATHER W EATHER EATHER W

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OPINION OPINION OPINION OPINION OPINION OPINION OPINION OPINION OPINION OPINION T!" T"#! Hess ’15, Jacob ’15, Annia Pan London ’15. Editors: Senior Staff: Steinbrecher G, Zygimantas Straznickas ’17. Director: Aaron Hammond ’17. Editor: ’18, Dibert Mori ’18. Sophie Karia ’17, Swaminathan Vivian Krithika ’17, Martinez ’18; Hu Lenny ’17, Madlinger Editors: Hua Ray ’15, Hilgenbrink Wu ’16, Costa ’17. Christopoulos Casey Shaena ’13, ’12, Kowch Berlin Roman ’11, Agard Vince ’18; Wang Amy ’18, Switzer F. Jennifer ’18, R. Srivastava William Sanjana ’18, ’18, Rodríguez Banerjee Rohan ’16, Xu Kath RayWang’18, DrewBent ’18; ’17; Nazemi Assoc Katherine ’17, Navarre William Editors: News ’15, Ren Chaarushena ’17, Carter Landon Sherry ’16, Liu Sarah ’15, Maynor A. G, Christopher Schumacher Renée Melissa G, Masuyama Megan Bost; ’18, C. Alexander Mirny ’18; Daniel Prakash ’18, Honscheid Editors: ’15, Schvartzman Rachel Katz ’17, PriyaT. Kikani ’17, Tara ’17. Ariel Lee ’15, Heroor Chennah ’15, Bozic Denis ’10, PhD Perez-Franco Roberto Edwina G, Villa Katie G, G, Sunter Kristen Matts G, Portocarrero Ian G, Kolodrubetz Daniel Editor: Soylemezoglu ’17; Editors: U available.rates typesetting (617) 258-8324. Facsimile: (617) 258-8226. 02139-7029. Mass. Tech,1e P.O. address: mailing Cambridge,our 397029, to Boxchanges class). (third year per $50.00 are Subscriptions 02139. Mass. Cambridge, Avenue, Massachusetts 84 Tech,1e W20-483, by Room summer the during monthly and January, during Wednesdays vacations), MIT during (except year academic the Tech!e ’18. Wadhwania Samir ’18, Lenny Hu Vivian ’17, ’17, Martinez Cheng Justine ’14, Wass L. Jessica Kali Xu ’15, B. ’14, Cai Anne ’13, Schalck Aislyn ’13, Pourian J. Jessica ’13, Kirschbaum Connor ’12, Solomon A. Jeff’10, JosephSmith Guo’11, Maurer Ethan’12, Quentin ’09, Wang Angeline ’08, ’09, Semenkovich Stephens Nick ’09, MichaelRamirez Ricardo Omari ’08, Y.ThibaultMarie ’08, ’08, Chu Austin ’07, McGraw-Herdeg ’07, Lukmann T. Ozer Andrew Zachary ’06, ’06, Sterner Vogt W. Marissa Beckett ’06, Dohzen Tiffany ’03, SM Collins Nathan ’02, Cholankeril J. Eric ’02, Bersak Ryan Daniel ’01, Seshasai Satwiksai Kaplan ’93, Saul Blumenthal ’98, Frank Dabek ’00, E. Jonathan ’91, Levinson A. Deborah ’84, Surman S. ’83, Barry Bove Michael V. ’74, Jr. Schindler, E. Paul Jessica ’17, Ma Junsheng Casey Pointing ’18. ’17, ’17, Chao ’16, Michelle Crownhart O’Grady ’16, J. Zhang Madeline Joyce ’16, Kim Nayeon Manager: Operations Manager: Advertising S. Erika ’15, Trent ’15, Timothy Yang ’16. ’15, Dohyun Lee Sullivan Steve ’15, Su Stephanie Cartoonists: ’18; Lin Jing G,Young Victoria G, Rolnick Davie Staff: RuschDeb ’18, Robert ’18. P AD E ONLIN TE BUS C P A SP OPINI P NEWS D R R H pper Valleypper Press, Inc. RT AMP O CHN ODU ODU IT O VI S RT IN T O SO STA O O US L ESS Stephen Suen ’15. G, Moberg A. Emily G, Lam Stephanie STA R S (ISSN 0148-9607) is published on Tuesdayson published is 0148-9607) during (ISSN Fridays and E MED

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policies Parental leave L 8ts availablebene employees. to MIT therange8ts websitethe Bene to see of stages oflife. Iencourage readers to visit providing8ts forour bene employees at all diverse community but are committed to formula8ts forour whenitcomesto bene leaves.existing leave 8t inconjunctionthese bene with that parents MIT thenewpaid use will placement ofafoster child). We anticipate simultaneously forthebirth, adoption,or of unpaid leave understate law (may run the Family Medical Leave Act, and5weeks a right to +- ofunpaid leave weeks under addition, eligible mothers andfathers have ofachild. In thebirth —upon 5 weeks are eligible forpaid sick leave —usually leaves employees. forMIT Birth mothers tal Leave isinadditionto otherparental to emphasize that the/days ofPaid Paren employees. alreadypolicies available to eligible MIT Oversight Committee, which addsto leave 8t approvedbene by theEmployee8ts Bene , concerning anewPaid Parental Leave anannouncementclarify sent onApril onAprillished 3o7ers methechance to ETTERS C We recognize that there isnoperfect In hindsight, anopportunity missed we Yarden Katz’s guest columnpub OPINION POLICY OPINION condense letters; shorter letters will be given higher priority. priority. higher given be will letters shorter letters; condense accepted. be not will letters Unsigned numbers. phone and addresses, signatures, due by 4:2.p.m. days two before thedate ofpublication. by sent or are submissions .-+23 All W-.-452 . Room to mailinterdepartmental -,.-3, Mass. to Cambridge, 23,.-3 addressed , Box be P.O. should submissions to copy sent Hard be should and encouraged are submissions newspaper.Electronic the of that necessarily not author,the of opinion representthe and individuals by written choosing to publish theirdisagreement theeditorial. with Lazar. Yu, Executive Editor Tushar AnthonyKamath, and Opinion Editor Claire Editor Managing Lin, Leon Chief in Editor Conway, written by the Editorial Board, which consists of Chairman Will "e-Rush Vice is theMIT Go Lorraine A. ORRECTIONS etr, oun, n cron ms ba te authors’ the bear must cartoons and columns, Letters, editor the to Letters Dissents Editorials President Human for Resources. are the signed opinions of editorial board members T il pno of opinion o0 cial the are O TH Tech !e E , columns ED ITOR - eevs h rgt o dt or edit to right the reserves , and , - editorial cartoons editorial [email protected] campus Security policies on out things some until Idugout my wallet. backpack, kneltonthe9oor, andpulled ver itover I8nally thesensor dropped the to maneu and after unsuccessfully trying inmy deep was buried overfull backpack, exhaustedto thedorm andcold.My ID change. to had beliefs my so in, believed I MIT the other. each wasn’t to is 1 pointing tors anendlessofadministra loop or worse: information, false walls, stone with met were and channel proper every through We hurt. complained Disillusionment us. for best was what know to trusted be not could we us told and us, to lied children, like us treated paradise found once I where institute e 1 campus. this own We clear: equally was MIT from message e 1 workers. desk student preferred we decided had we that again, over and over clear, made had dorm my of residents e 1 play. power nasty a of reminder daily a as stands lobby the in desk extra e 1 ofgeneralscope life, minor. seem they are annoying andinconvenient, but, inthe taneously to visit. decide changes 1ese logistical complication spon whenfriends to retrieveseconds identi8cation. 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An updated version of the article online also makes for policies leave parental existing substantial to addition in is parentalleavepaid of days 8ve of leave8t bene new the and policies, parental separate have students graduate MIT and ees MIT’semploy MIT thatmisleading.wereparental leave policy Guest columns Guest e Tech!e get oun ulse Tedy ae eeecs to references made Tuesday published column guest A Tech !e ’s telephone number is (6+,is number -/2’s-+/4+telephone ) the is Email . !e Tech - - ae n cmimn t pbih l the all publish to commitment no makes - are opinion articles submitted by members by submitted articles opinion are ’s Web site and/or printed or published in erence is that there’s little MIT can do do there’scan that MIT is erence 7 little di e 1 miserable. less you make will security the because 7o -campus, live I when MIT to Come miserable. less you make will er weath the because February, not April, in to Come constraint. simple a like seemed it time, Atthe security. through go haveto didn’t we when me visit to easier be would it that friend my told I 7 o -campus. moving was I so lived, I where home at feel didn’t I Why? months. few a visit the postpone to best be would it that MIT. at me him visit told I come to wanted friend semester, old last an point Atone haveperiences made less at mefeel home. who Iwas. Isay residence because fewex myit seemed residence still didn’tknow day that forayear,exited every door but ness over swept me. Ihad entered and through bitter theglass. Overwhelming workerAn Allied-Barton stared coolly school — is dramatic. their and — space living their perceive students how in shift the but changes, small like seem may ese 1 community. and peers my of trustworthiness the ate appreci can I gone, are those Nowis.that actually it whether of regardless needed, is protection the that impression strong a creates everywhere measures” “protective Seeing matters. Environment campus. weather. the about [email protected] ere were more major shifts, too. shifts, major more were ere 1 Now, I feel far safer than I ever did on on did ever I than safer far feel I Now, [email protected] [email protected] Jade Philipoom is a member of the the of member a is JadePhilipoom http://tech.mit.edu [email protected] F$%&'(,)$%* A +,, -.+/ . Please send press send Please . . e Tech !e Ltes o the to Letters . e Tech !e . Class of #$%&. ad it and , can be be can , and , ------! FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN F UN F UN F UN FUN T./- T-.

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FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN T!" T"#! Solution, page18 Spring Sudoku Solution, page18 Sunny Sudoku Instructions: Fillinthegridsothateach column,row, and3by 3gridcontains Instructions: Fillinthegridsothateach column,row, and3by 3gridcontains Solution, page18 Pair ofSixes 42 Fractions ofamonth: Abbr. 41 Demean 40 Annoys, informally 39 Portions ofcorn 36 Sewing-kit items 35 Casualgreeting 34 Baby boys 33 Become inedible 30 Perform apart 29 Sportssquad 26 Trash holder 24 Architect’s drawing 23 Farmland measure 22 Takes chances 21 Coffeehouse order 20 Football six-pt. plays 17 Basic conceptin 16 University of! cial 15 Flyingtoy withatail 14 “You arenot!”retort 10 Competent 6 Mixwithaspoon 1 Planepilot ACROSS

economics exactly oneofeach ofthedigits1through9. exactly oneofeach ofthedigits1through9. 9 ColorofSanta’s suit 8 “Maybe, maybe not” 7 glarereducer Windshield 6 Hockey player’s footwear 5 Attendance-taking ritual 4 Sixthsense,for short 3 Mischievous kids 2 Praise highly 1 Clenched hand DOW 63 Smooths(out) 62 “Don’t you wish!” 61 Picks up the tab 60 Nolaterthan 59 Aware of 58 Notdoinganything siblings 55 Fairy-tale 52 Day before aholiday 50 Usewatercolors 47 Gottoone’s feet 46 Fissure 45 Gettoone’s feet 44 Loses traction 43 Preschool basics by GailGrabowski N 48 Cry oftriumph 48 Cry 47 Cruise vessel 46 Get__(throw out) 45 Valentine’s Day "owers 44 Perform inachoir 43 Assistant 38 Notentirelywrong 37 Recedes 35 Planet’s path 34 Pesto-cooking vessels 32 Oceanmovements 31 Run after 30 Inthelead 29 Ice-cubeutensils 28 Farmers tillingsoil 27 Say something 26 Good__(well-repaired) 25 Be durable 23 Corrosive compounds 19 Dutch cheese 18 Knitting material 13 Concludes 12 Narrow road 11 Grizzly, for one 10 Guy whowritesjingles Techdoku I Solution, page18 Techdoku Techdoku II Solution, page18 Techdoku Instructions: Fillinthegridsothateach columnandrowexactly contains oneof Instructions: Fillinthegridsothateach columnandrowexactly contains oneof each ofthenumbers1–6.Follow themathematicaloperationsfor each box. each ofthenumbers1–6.Follow themathematicaloperationsfor each box. 52 Endingfor kitchen or 51 Pre!x meaning “against” 49 Merely luncheon 57 Greeting-card holder: Abbr. 56 Mauna__macadamia nuts 54 Letters after kays 53 Artery’s opposite F$%&'(,)$%* A +,, -.+/ ! FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN FUN

------A A C ) to ) of T./- T-. n . 0e n A obtained . Note that for all odd R uncovered. B C A in the square B and and , leaving A . Now every odd square B B square grid has been tiled n ), it only ever occupies odd × n . m and the domino covering , … of (s, *s and 4s such that no C 60 Facial feature 60 Facial 61 Notable period racket 62 Loud 4 A a , ) and the sequence of odd squares * is ever empty, then Sarah can slide n Does there exist an in2nite sequence Compiled Compiled and edited by Matthew Suppose that there is a there cycle that of arrows. Suppose Problem Problem Source: Russian Math Olym Compiled and edited by Matthew a B , . Otherwise there must exist a cycle of ( a contiguous contiguous block appears twice in a row? For example, neither ” “44 nor ” appear. should “(4*(4* Brennan. square square short end of this domino not bordering borders another odd square if the domino into For all such pairs grid, draw an arrow from the center of to the center of other than the starting position , (( the grid has exactly one arrow leaving it. Beginning at an arbitrary odd square of the grid, follow the arrows beginning at this square until either there is no ar row to follow or we arrive at a square we have visited before. If there is no arrow to startingtheposition at be must follow,we , (( along the arrows we followed in reverse order gives a path along which Sarah can , (( from square the uncovered move C impos be to shown bewill which arrows, sible. Note that it su:ces to prove that a cycle of arrows is impossible since then there must be a sequence of moves leav ing the uncovered square in squares Let the value of the cycle be the number con gridcompletely the of squares unit of tained inside the cycle. We note see that the To odd. be always must cycle a of value this, note that any cycle can be obtained as the perimeter of a region iteratively as follows: start square with vertices at the centers of four with a *×* odd squares and iteratively add more of these *×* squares along the perimeter of the region. e 0 initial *×* cycle has value *×* each that shows casework some and , ( square added to the region increases the value of the cycle either by However, * odd. is cycle or any .of 5 value 0ere the fore since the nite number of steps? number 2nite square , ( ( squares. Now it will be shown that every oddsquareConsider isreachable. anodd by by dominos, the squares inside any cycle must also be tiled by dominos and there fore even in number. 0is is a could arrows contradic of cycle no therefore and tion have existed to begin with. (77) piad Brennan. Problem $

------n m × and and m x ) where ) where y , x and the columns m square grid, where where grid, square 56 Make eyes at eyes 56 Make At another time 57 58 OR imperative n × m . . Label the rows down the from left to right. Call a Call left to square from right. n erefore any student student any erefore 0 . 7 least at is L e e 0 integers. positive odd are n Note that in any given move, Sarah Sarah Sarah is playing a game similar to the Solution A lattice point is a point with all integer integer all with point a is point lattice A Problem Problem Source: Russian Math Olym take turns marking squares in a 4×4 grid. Can Bob force Alice a 2×2 to complete block before he does? Alice and Bob are both odd integers. It will be proven is is tiled, Sarah can move the square exactly uncovered to the odd squares in the grid. moves the uncovered square exactly two units in one direction. the 0uncoverederefore square begins since on the odd board board game Rush Hour on a board con sisting of an and square board is initially tiled with overlapping dominos non- such that only the upper-right square of the board is uncov ered. Sarah is allowed to slide into dominos the single uncovered in this square way, move and, the uncovered square Sarah where that Prove the board. around can move the uncovered square does not of the board. depend tiling on the initial square grid from ( to from ( to ( coordinates odd if it has y that regardless of how the square grid ordinate plane ordinate drawn on an in2nite sheet of paper. 0e distance between the two legs cannot be changed. You are allowed to 2x one of the legs and swing the other to possible it Is point. lattice another to leg switch the positions of the two legs after a e two legs of a compass are are compass a of legs two 0e coordinates. located at distinct lattice points in the co % Problem Problem # possible that everyone that tells possible the truth (that all six students called liars are liars) and anyone that deduce cannot John therefore that possible also is It honest. is liar a called any four consecutive students called hon est are liars, the student after them called a liar is actually honest and that everyone else is called what they 0is are. would re as possible is and liars nine of total a quire as long called honest could actually be a liar and there is no strategy where John duce can that someone de called honest is actu honest. ally (774 piad

------k k at L stu must k C . ere 0 of stu of k S general@ denote the . If the right the If . = . 8 If there of students is is 0 liars. 8 = k k L C L 38 Farm animals 38 Farm overtime 39 Headed for 40 Question of identity talk45 Rapid (on) Added 46 47 Preindication 50 Self-assurance 51 Ecuador neighbor 52 Line of rotation 53 Competing team elevator 55 Brit’s 13 Green Berets’ branch Green Berets’ 13 Nursery-rhyme tumbler 18 game 21 State-run 23 Castle towers Abbr. Assorted: 24 25 Source of milk 26 Designer Kamali matches 27 Boxing URL 28 End of UNESCO’s 30 Requirement 31 Planetary path locale 32 Beach 33 Fiddled (with) writers Ticket 35 )/ k liars which is at students who call students k k + + (minimized when when (minimized k k )/ k liars, then John can de can John then liars, 8 = must be liars if the rightmost rightmost the if liars be must . . What is the largest possible is implies that the number number the that implies is 0 . . L L . 0e answer is C k for which John will always be L 0e password to a safe consists of sev Solution To see that there is no strategy for Suppose there is there Suppose this a where situation and therefore there are at most * most at are there therefore and is honest? table. John, a John, at teacher their does school, table. not know who is honest and who is a liar, student. honest an nd 2 to looking is he but right their whether them of each asks John stu An honest or a liar. is honest neighbor a while liar correctly, answers always dent can answer or either correctly incorrectly. John knows that the number of liars does not exceed value of able to nd 2 a student who he can deduce column, please send them to tech.mit.edu Problem " en di1erent decimal digits. 0e safe will open if you enter seven correspond the matches them of one and di1erent digits ing digit of the password. Can you open seven attempts? in fewerthis safe than the second rightmost student must also be be also must student rightmost second the a liar, as must be the third rightmost stu dent. Continuing this logic yields that all students in student were a liar. erefore 0 there must be at least 4+ ( – * least 7 for integers = , , 9). 0is situation is therefore not pos most at are there since sible work. must strategy John’s that proves least , 7 consider the case in which every fth 2 student around the table a liar is and the rest called are called honest. It is dents dents who call their neighbors liars. us 0 there are at least 4+ – * their neighbors honest. Now consider a contiguous string of students their who neighbors honest. e 0 call rst 2 student in this string must have been called a liar student the or student that either thus and to his or her left must be one of the liars in counted of strings contiguous of students who call their neighbors honest is at most fore the longest continuous string length have leastat ( 4+ – * then liar, a were string this in student most are are at most duce that the rightmost student longest in contiguous the string is is at least half the number of students in S who who call their neighbors honest must be honest. strategy does not work. Let number of liars among the dents set called liars and the students to the left of students called liars. Note that if a right her or his to student the calls student either that or student a the liar, to student his or her right must be a 0erefore liar. by Fred Piscop Fred by N ------), ), th th ( i z , ( ) and and ) 9 Tofu source Tofu 9 Tile art 10 Not bumpy 11 Hunt for 12 65 Leaping insect 65 Leaping App buyer 66 off Tapered 67 68 Camp setup DOW shavers 1 Little 2 Norse explorer haul Trawler’s 3 4 Diplomatic !nesse 5 Ski-resort vehicle out to check 6 Prepares gross!” “That’s 7 8 De!nite article 49 Email nuisance concoction Tomato 51 wildcats 54 Spotted 59 Escape hatch or Luke 60 Obi-Wan horse 63 Go by 64 Crop up i y z , , i ( must be be must y x n , i x = . 7 First we lattice points points lattice n n ) in three dimen

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y Solution ere ere 0 are 4+ students, each of whom A A lattice point is a point with integer Problem Problem Source: Problem Solving Solution Alice Alice and Bob alternately mark the Technical Problems Technical Problem Source: Brilliant.org Source: Problem , , j * 46 Blew a whistle 46 Blew 48 Moreover 41 CPR expert clean 42 Rubbed to the payroll Add 43 44 Most hoarse-sounding 35 Wave’s top Wave’s 35 pi after 36 Letter loafer 37 Stetson-wearing 24 Me, in France 25 Open, as a gate per pound, e.g.29 Price 34 Entryway 20 Comedian’s routine 20 Comedian’s and lean 21 Long durable 22 Be 15 Tex-Mex chip Tex-Mex 15 Higher than 16 Radio-station personality 17 to be Look 19 5 Barbecue rods 5 Barbecue Tableland 10 delivery Contralto’s 14 Solution, page 18 ACROSS away Went 1 On Horseback x x some some two of these segment joining them passes through an point. other lattice in in three-dimensional space, there are is is either at honest sitting or a a round liar, show show that any 7 lattice points ( coordinates. Find coordinates. the smallest positive in teger Strategies by Arthur Engel rst player to complete a to *×* be complete never the rst player 2 sub-grid and will always strategy. win with this ice plays in the fourth). If Bob were ever to to ever were Bob If fourth). the in plays ice complete a *×* sub-grid, some casework shows that a *×* sub-grid must have already been completed. erefore 0 Bob can the Bob (e.g. of square the two away row rows plays in the third row if Alice plays in the 2rst and Bob in plays the if secondAl row loses. Who can force a win, and what is the the is what and win, a force can Who loses. strategy? player’s winning with the following strategy. If Alice marks squares squares of a 5×5 square grid, with going rst. 2 Alice If a *×* sub-grid is completely she or he then turn, player’s a after marked earlier. 0e earlier. solutions to last week’s prob lems will be included in the column next week. If you are interested in having one the in published solutions your of more or ates ates of all majors. 0e new column problems each week as features well as solu tions to the problems posed two weeks consisting consisting of puzzles and math problems intended to be accessible to undergradu with with all of their coordinates equal to ei . any ther No joining segment two + of or ( these points passes through another lat tice point. the the segment joining them passes through that see To point. lattice another , at the consider least 7 unit cube of points of of their coordinates must have the same parity. e 0 midpoint of these two points must also be lattice point and therefore ( $ Problem # Problem Solutions to Technical Problems from April 2 April from Problems Technical to Solutions " Problem Technical Problems 3 each each point is of one e, e), o), (o, o, e), (e, o, e, o), e, e), of (e, (e, (e, the eight are forms there Since o). o, (o, or e) o, (o, o), e, (o, 7 > some 8 twopoints, points ( sional sional space have the desired property. If e denotes even and o denotes odd, then ( *+(, , () A &!"' , F!"#$% ! T!" T"#! F$%&'(, A)$%* +,, -.+/

This space donated by The Tech F!"#$%, A&!"' (), *+(, T-. T./- ! Campus Preview Weekend Interviews by Ray Wang and Photography by Jessica L. Wass The Tech Interviews Class of 2019 Admits Jenny Dong from NYC Kevin Zhao from South Carolina

What’s caught your eye so far? Where are you temped? I really want to learn to play tennis in college, Beta Theta Pi, across the river. It’s actually really so I saw the tennis courts, and I was really ex- nice! They’ve recently renovated the house. cited that we would have the opportunity here. What have you explored so far? What did you get to see? Haven’t had much chance to explore everything! We tried to go to dorms, but I was with a group I started off pretty rough, had to go to the medi- of people who wanted to go to different events. cal center and get a syringe … ’cause I recently It’s not such a bad thing because we got to talk got my wisdom teeth removed! and we got to see the campus. As we walked around, we could see the Charles River, so it was a good scenario.

Sooraj Boominathan from Oklahoma

Kevin Wang from Oklahoma How have you liked CPW so far? It’s been really exciting, a lot of stuff going on at the same time! Where are you staying? There’s just a right balance where you can still do what you want and get a good experience without I’m at the Kappa Sigma fraternity house. It’s pretty great! My host is being, like, shoved in the face with too much. pretty cool too. I noticed you guys were sitting here resting. Where did you just come from? What are some of your interests you plan to explore? We just got back from the prefrosh welcome and we decided we’d try and schedule out tomorrow! I’m planning to major in chemical engineering, so me and Sooraj We’re planning on going to some entrepreneurship things tomorrow ... for the free stuff and the actual signed up for the UROP tour, so we’re pretty excited about that. events.

Angela Lin from NYC Benjamin Grey from Arcata, California How many people are here from your school? What’s your favorite thing about the campus so far? Like … 20-ish? I just like the quirkiness of everything! You see a lot of people doing Where do you guys go to school? random things and they just don’t care. Stuyvesant High School, haha! Like if you see all the liquid nitrogen people wearing safety neon col- What’s in your COOP bag? ors; it was really, really funny! I bought a sweater, an MIT sweater, and then I bought a water bottle. The Stuyvesant girls’ lacrosse What were they doing out there? team is called the Huskies, so I bought two Huskies. One’s for my boyfriend; I just wanted to do They were making ice cream — it was really good! something cute for him! !" T!" T"#! F$%&'(, A)$%* +,, -.+/ T!" T"#! !!

Noelle A. Colant ’17 sings as Mayzie LaBird. Jesse N. Orlowski ’16, Joschua B. Scherrer ’18, and Cole A. Graham ’15, playing the Wickershams, sing during a rehearsal for Seussical on Wednesday night. NextAct, founded in 1985 and celebrating 30 years of Kristina S. Kim ’17 sings as Jojo. performances this spring, performs an annual show during CPW in Next House’s Tastefully Furnished Lounge.

PHOTOGRAPHY BY Alexander C. Bost–The Tech

Kristina S. Kim ’17 and Isaac T. Yandow ’15 sing with the cast.

The cast surrounds Kristina S. Kim ’17 as Jojo.

Caralyn R. Cutlip ’17, as Gertrude McFuzz, sings with the Bird Girls. Zoe R. Sheinkopf ’17 leads the cast of NextAct’s Seussical as Sour Kangaroo. Isaac T. Yandow ’15 as Cat in the Hat. !"

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If so, become a Tech Illustrator! Tech become a If so, Do you like doodlingDo you like during class? your with covered psets Are drawings?

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Campus proposals include relocating CPW slide fun at Next House museum, housing students in warehouse MIT is weighing the pros and cons planning team aims to accommodate of housing undergraduates in the Met- /..-3.. more graduate students across ropolitan Storage Warehouse building, east and west campus. among other proposed ideas for re- 1e west campus planning study is vamping campus. also exploring the possibility of adding In an email to the MIT community on new graduate and undergraduate resi- Tuesday, Chancellor Cynthia Barnhart, dences, renovating current residences, Provost Martin A. Schmidt, and Execu- and incorporating more open spaces tive Vice President and Treasurer Israel such as the landscape that is to be cre- Ruiz announced developments in the ated on the site of Bexley Hall after it is Kendall Square and east campus design demolished. process, and in the west campus plan- 1e email also mentioned potentially ning study. using the Metropolitan Storage Ware- In the Kendall Square and east cam- house, located on Vassar Street, as “an pus areas, the planning team aims to add exciting site for a mixed-use develop- “housing, connected open spaces, retail, ment.” Some ideas for this space include innovation space, childcare, and com- an undergraduate residence, or a maker mercial space,” as well as move the MIT space on the 2rst 4oor with collabora- Museum into that area. tive working environments on the above Part of the plan includes adding a 4oors. new graduate housing facility, which will Barnhardt, Schmidt, and Ruiz also replace the Eastgate Apartments but will encouraged members of the MIT be built on a di0erent site nearby. 1e fa- community to share their thoughts cility is expected to open before Eastgate about campus planning by emailing closes to prevent a housing shortage, mit!"#"[email protected] and attending and may accommodate more than twice community meetings. LANDON CARTER$THE TECH the number of graduate students that —Alexandra Delmore Next House built a giant slide, nicknamed “Big Slipper,” for CPW this year. The Eastgate currently does. Speci2cally, the slide is about 20 feet tall and features angles of up to 55 degrees.

Minor crash at W20 Saferide turnaround Divers search for body in Charles

ALEXANDER C. BOST$THE TECH ROBERT RUSCH$THE TECH A Mercedes-Benz crashed into a temporary fence at the Saferide shuttle turn- A police diver !nishes up after searching for a body in the Charles River around outside W20 on Sunday night at around 10 p.m. around 10 a.m. on Wednesday, April 15.

Be a PENguin write for us e-mail [email protected] F!"#$%, A&!"' (), *+(, T-. T./- !"

AT www.SWAPFEST.us NOW the of SOFTWARE - HARDWARE Sunday April 19th M - Buy Sell Swap - Albany and Main Streets, Cambridge TAILGATE ROOM FOR OVER 200 SELLERS Rain or Shine — Garage Available I BUYERS $ 6 FREE! $4 with MIT, Harvard STUDENT ID Buyers Parking VENDORS SELLERS $ 20 from all of per space includes 1 admission New England T Come early for BEST BARGAINS Sponsored by: W1MX, the MIT Electronics Research Society, W1XM/R and the Harvard Wireless Club

This space donated by The Tech

MIT SOUNDING AN ANNUAL PERFORMANCE SERIES FEATURING RARE LIVE PERFORMANCES BY NEW MUSIC PIONEERS

TERRY RILEY’S 80TH BIRTHDAY CONCERT INCLUDING TERRY RILEY, SARAH CAHILL, EVIYAN, GAMELAN GALAK TIKA, WALLACE HALLADAY, UNIVERSITY OF TORONTO SAXOPHONE ENSEMBLE, AND ELIOT GATTEGNO.

FEATURING THE WORLD PREMIERE OF EVAN ZIPORYN’S ALL!LIVE MULTI!SAXOPHONE VERSION OF RILEY’S CLASSIC “POPPY NOGOOD AND THE PHANTOM BAND” AND WORLD PREMIERES OF NEW WORKS IN HONOR OF TERRY RILEY BY KEERIL MAKAN, ELENA RUEHR, CHRISTINE SOUTHWORTH, AND OTHERS.

Saturday, April 18, 2015 / 7:00 pm /

Get tickets now: arts.mit.edu/sounding !" T!" T"#! F$%&'(, A)$%* +,, -.+/

Putnam, from Page 1 pare for the Putnam by taking +1.A02 (Problem Solving Semi- year was 0 points out of +-., nar) taught by Bjorn Poonen, a and many people get a score of math professor and four-time zero. “I’d tell people interested Putnam Fellow himself. in taking the Putnam to go for it 3e Fellows received 4-,/.. and not worry about the com- each, and the scoring team petitive part; you should take it members received 4+,... each for the chance to work on fun in addition to the 4-/,... that math problems and discuss MIT was awarded. them afterwards,” Sellke said. —Sanjana Srivastava Freshmen at MIT can pre- Much hinges on constitution at UA Accusations, resignations bring scrutiny & changes to document UA, from Page 1 resigned from the board in protest of Halloran’s move early Monday, speech. Yet just minutes earlier, she observing: “Two of three is a ma- had admitted that she “should have jority; one is not. 3at is good math not acted with haste” when sign- and good law.” ing o5 on an unauthorized 4+-,/.. 3e UA constitution was unclear expenditure without consulting the on whether Sharma’s resignation council. and Davis’s ascension had to pro- “3e decision was especially ceed via direct transfer to the newly hard given the type of person I am,” elected administration or through she said of using the cash to bring a series of snap-resignations down Lil B to the in Novem- the line of succession, with each ber, where the rapper posed ques- UA executive assuming and subse- tions like “What does having money quently leaving the organization’s really mean?” and commented on highest o7ce. But these vexing de- the beauty and signi6cance of ev- tails were resolved when, in decid- erything from grass to the podium ing to proceed with the swearing in in 0--+-0. of Davis and Liu, Halloran invoked “My decision was made to pre- a little-known parliamentary ma- serve the stability of your student neuver: “Are you OK with it? I’m on government and to refocus the ef- board with it.” forts of student leaders on initia- “Someone said a 8aw in the con- tives on student life,” she said of stitution?” a student at the meeting resigning. o5ered in mock surprise at the im- Sharma’s email to undergrads provised proceedings. Little sym- Wednesday announced that she pathy was to be found for the docu- would “step down” and “transi- ment, which had been subjected to tion” to Davis — she had carefully days of hair-splitting examination This space donated by The Tech avoided “resign” throughout the by councillors mulling their options controversy. for removing Sharma. “Technically you have to say you Davis, who was the only coun- resign,” John W. Halloran ’+/ said at cillor to don a necktie for the occa- the end of her speech at the meet- sion, saw through the passage of a ing, then in his third day as the Judi- constitutional amendment within cial Board majority of one. the 6rst +/ minutes and 0, seconds A unilateral ruling by Hallor- of his term. 3e amendment cor- an last week cleared the way for rected the thresholds for removing a pending impeachment motion a president to require a proportion to come to a vote, but councillors of councillors rather than an arti- never exercised the option in light 6cially high absolute number. 3 e of the pending resignation. 3e sec- change, of course, was made just ond of the two extant judicial board days after the only time in years it members, Moriel W. Levy ’+,, had would likely be relevant.

A sampling of people you’ll meet during a

Derek, Course 1 Will, Course 8 Anne, Course 17 Kath, Course 2 Jess, Course 9 Leon, Course 18 Esme, Course 3 Joyce, Course 10 Jack, Course 19 Dohyun, Course 4 Vince, Course 12 Tushar, Course 20 Vivian, Course 5 Anthony, Course 14 Stephen, 21/CMS Austin, Course 6 Maggie, Course 15 Keith, Course 22 Kali, Course 7 Chris, Course 16 Marissa, Course 24

Meet your new pset support group

Established 1881 [email protected] W20-483, 617-253-1541 F!"#$%, A&!"' (), *+(, T-. T./- !"

This space donated by The Tech !" T!" T"#! F$%&'(, A)$%* +,, -.+/ Limited events for prefrosh post-! a.m. B\e[Xcc LGBT group G@MIT is only group to secure a late-event exception CPW, from Page 1 Hurowitz ’+0 said: “4e policy has changed the events Next House Many students are not in favor traditionally holds. 4e + [a.m.] of this year’s ban. rule means we cannot hold events Senior House President Adri- as late.” ?`g# anna Rodriguez ’+0 said she would “CPW can be incredibly over- prefer that the ban extend from 1 whelming,” she said. “I felt that a.m. to 2 a.m. pressure when I was a prefrosh. “I think that would be a bit more Although many prefrosh will prob- reasonable and more re3ective of ably 5nd ‘after hours’ events or what our schedules are actually continue to hang out with others, like, at least for a good number of I do feel like a sizable number will Senior House residents,” she said, just go to bed early and miss that efk adding that any night-time ban MIT experience. However, what “leaves out a large portion of the convinced me to come to MIT was MIT community that is actually not the 5rst two nights when I went nocturnal.” to bed relatively early, but the last Only G@MIT’s event “Super Se- one when I stayed up till 6 a.m. cret Queer Time” has been granted talking to people I’m still friends an exception to take place after with today.” JhlXi\% + a.m. According to Schmill, G@ Gaurav J. Singh ’+/, the Under- MIT argued that students needed graduate Association’s CPW Rep- a time outside the window of other resentative, believes that the policy events in order to feel comfortable will diminish the spirit of CPW for attending. prefrosh who are awake late at A number of other events ap- night. “Prefrosh who are awake may plied for exceptions, such as Fire- experience di7culty 5nding some- hose, Pinkie’s Diner, and MacSim- thing to do after + [a.m.],” he said. Next Ultimate, but all were denied. “[M]any prefrosh will have a 4e criteria used to determine harder time 5nding available MIT which events receive an exception students to talk to. I think the policy remain undisclosed. falsely gives the impression that Next House President Haley MIT student life ends at + [a.m.].”

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The MIT Press Bookstore’s

Solution to Sunny Sudoku Solution to Techdoku I from page 6 from page 6 Solution to Spring Sudoku Solution to Techdoku II from page 6 from page 6 Meet your fellow tech sta!. (aka, your new 3 a.m. pset support group)

“a feeding frenzy for the brain!” [email protected] W20-483, 617-253-1541 F!"#$%, A&!"' (), *+(, T-. T./- !"

Event open to all. Sign-ups required as spaces are limited. !"

SPORTS S PORTS S PORTS S PORTS S PORTS S PORTS S PORTS S PORTS S PORTS SPORTS S PORTS S PORTS T!" T"#! Do youenjoynosing aroundandcollectingevidence? Do youlikeaskingtoughquestions? [email protected] If so,wewantyou onourteam! The Tech The Do youwanttobelikeSherlock Holmes? Track and Field Sean Collier Invitational Collier Sean Field and Track Saturday, April 18 Men’s Tennis vs.NewYork University Friday,17 April HOME UPCOMING Men’s Lacrossevs.WheatonCollege Men’s Tennis vs.EmersonCollege Baseball vs.Western NewEnglandUniversity 22 April Wednesday, Softball vs.Tufts University Softball vs.Tufts University T Softball vs.ClarkUniversity Softball vs.ClarkUniversity Sailing vs.ThompsonTrophy Sailing vs.President’s Trophy Sunday, April 19 Baseball vs.WheatonCollege uesday, April 21

islookingforinvestigativereporters.

E VENTS

7 p.m.,SteinbrennerStadium 4 p.m.,duPontTennis Courts 5 p.m.,duPontTennis Courts

10:15 p.m., Steinbrenner Steinbrenner p.m., 10:15 9:30 p.m.,CharlesRiver 9:30 p.m.,CharlesRiver

12 p.m.,BriggsField 12 p.m.,BriggsField 5 p.m.,BriggsField 3 p.m.,BriggsField 2 p.m.,BriggsField 3:30 p.m., Briggs Briggs p.m., 3:30 Stadium Field a two-run rally for MIT. Tew grounded out to plate one to Engineers3- 5 . it make the for runs more two home brought de liveredRBIanbasehit. ground who A wildoutandpitcha Greene Sean for corners the on runners put double.errorathirdwithAn JohnwhenCaliri o1 led and eventually scored pitch to make onawild it5-. . betweenthedoubles andRobert R.Bishop ’+/ singled thanielRodmanH.’+4 Cornwellsingle.RBI addedan Na and ’+/Tew A. Parker to doubles run-scoring ing includ Engineers, the to hits straight four surrendered ed the 0rst out for WPI (+4-+-, ,-, NEWMAC), but then MIT fends oMIT ! WPI to improve to- #" in NEWMAC in rst! inning of "-# victory Baseball scores four times Women’sMen’sand Athletic Conference (NEWMAC) held o1 WPI down the stretch to take ,-/ New England A pair of singlespairbottomoffourththetheup Ainofset the inone-rungame a itmake to back came WPI rst inningthen0 rstandthescored timesMITfourin rst inning. Starter C.J. Doskocil record Doskocil C.J. Starter inning. 0rst tletime getting onthe scoreboard inthe ditti drove inapair forWPI. Ven Alex while Engineers the for runs three afternoon. in drove ’+/ Cornwell K. Hayden Tuesday victory baseball NEWMAC) wasted lit (+-wasted -,MIT NEWMAC) 2-3 , By PhilHess DAPER STAFF DAPER ------for the Engineers. WPI threatened in the eighth, getting AlanWang ’ +4coming in to pitch the 0 nal and two seventhinnings the of out 0nal recording theMorrison scored both runners. thatright doubleto Venditti,a withgreetedhim who sonM.Morrison ’+, outofthe bullpen forMIT toface Vinny Ja in brought before7 at walk. out singled two D’Ambrosioa drew Comei Nick down one With 0ce 6y to center. asacri with the afternoon run in the sixth when Cornwell drove in his third run of anotherbring4in-makeaddeditand3anotherMIT . run before Cornwell came up with a two-out base hit to lead WPI. ing the waylead withTew three. with ZachMIT, Blanchard for wenthits 3 -for-5multiple to had all +8’ Filiere hits. nine on run six tooktheloss forWPI, going 0veinnings andgiving up mound,fanningtheinnings0twoDoskocilon ve.his ofone-hit, one-run relief. Wang allowed just one hit in day, received his 0rst win of the season with 3.- innings the side downinorder intheninth to record thesave. picked up a key strikeout to end the threat and then set runnerssecondto andthird withtwoaway, butWang Fromthere theMIT bullpen gotthe job done, with seventh. the of top the in back right came WPI e, onel Rda ad rsmn utn M. freshmanAustin and Rodman Cornwell,Tew, EricTu’ +4 thesecond,fourof pitchersMIT theon F$%&'(,)$%* A +,, -.+/ - -