Dc Prf-SPOJ-Classical.Ps

Archives of the Sphere Online Judge classical problemset Editors: 1Hem nt Verma Nghia Nguyen Hoang <ul style="display: flex;"><li style="flex:1">Ł z Kuszner </li><li style="flex:1">Lukas Mai </li></ul>balaji Stephen Merriman u.swarnaprakash Blue Mary Andrés Leonardo Rojas Adrian Kosowski Duarte Adrian Kuegel <ul style="display: flex;"><li style="flex:1">Brian </li><li style="flex:1">R hul Garg </li><li style="flex:1">Yash </li></ul>Neal Zane Robert Rychcicki <ul style="display: flex;"><li style="flex:1">Chinh Nguyen </li><li style="flex:1">VOJ problem setters </li></ul><ul style="display: flex;"><li style="flex:1">Paweł Dobrzycki </li><li style="flex:1">????? </li></ul>Patryk Pomy alski Konrad Piwakowski <ul style="display: flex;"><li style="flex:1">Frank R fael Arteaga </li><li style="flex:1">Zhang Taizhi </li></ul>iorel alii Mauro Persano <ul style="display: flex;"><li style="flex:1">Tomek Czajka </li><li style="flex:1">P.Kasthuri Rangan- </li></ul>Pripoae Toni Sebastian Kanthak <ul style="display: flex;"><li style="flex:1">Reinier César Mujica </li><li style="flex:1">Bartłomiej Kowalski </li></ul>Hdez Ivan Alfonso <ul style="display: flex;"><li style="flex:1">Radu Grigore </li><li style="flex:1">Olamendy </li></ul><ul style="display: flex;"><li style="flex:1">k Gor on </li><li style="flex:1">Martin Bader </li></ul>Lovro Puzar dqd <ul style="display: flex;"><li style="flex:1">Lordxfas x </li><li style="flex:1">Piotr Piotrowski </li></ul>Rusl n Sennov Tomasz Goluch Camilo Andrés Varela León Spooky Jin Bin Paritosh Aggarwal Thanh-Vy Hua Le Đôn Khue Roman Sol Csaba Noszaly Wanderley Guimaraes Analysis Mode (Bogardan Michał Czuczman Hellkite) Jelani Nelson (Minilek) Abhilash I Daniel Gómez Didier Paul Draper Ngô Minh Đu+’c Bobby Xiao Neal Wu Darek Dereniowski Prasanna Nguye^~n Ha Du+o+ng Piotr Łowiec Nguyen Minh Hieu Robin Nittka Qu Jun Ahmed Aly Fabio Avellaneda Adam Dzedzej Hoang Hong Quan Ajay Somani <ul style="display: flex;"><li style="flex:1">abhijith reddy d </li><li style="flex:1">Rahul </li></ul>Tomas. Bob Nguyen Van Quang Huy Nikola P Borisov Diego Satoba Mir Wasi Ahmed Luka Kalinovcic yandry pérez Pawel Gawrychowski Matthew Reeder Rafal clemente Marco Gallotta Pavel Kuznetsov Robert Gerbicz Chen Xiaohong Simon Gog Tomasz Niedzwiecki Andrés Mejía-Posada Andres Galvis Slobodan Alfonso2 Peterssen Krzysztof Kluczek Jose Daniel Rdguez Abel Nieto Rodriguez Bogusław K. Osuch Gogu Marian Kashyap KBR John Rizzo Race with time Michał Małafiejski Ivan Metelsky Phenomenal Le Trong Dao Muntasir Azam Khan Nguyen Dinh Tu 2Last updated: 2009-10-09 09:00:05 3Preface This electronic material contains a set of algorithmic problems, forming the archives of the Sphere <a href="/goto?url=http://www.spoj.pl/), classical" target="_blank">Online Judge (http://www.spoj.pl/), classical problemset. The document can be accessed at the </a>following URLs: <a href="/goto?url=http://www.spoj.pl/problems/classical.ps" target="_blank">in PostScript format: http://www.spoj.pl/problems/classical.ps </a><a href="/goto?url=http://www.spoj.pl/problems/classical.pdf" target="_blank">in Portable Document Format: http://www.spoj.pl/problems/classical.pdf </a>These resources are constantly updated to synchronise with the ever-changing hypertext version of the problems, and to include newly added problems. If you have obtained this document from another source, it is strongly recommended that you should download the current version from one of the aforementioned URLs. Enjoy problem-solving at the Sphere Online Judge! Disclaimer from the Editors. Despite our best efforts, it is possible that this document contains errors or that some of the content differs slightly from its original hypertext form. We take no responsibility for any such faults and their consequences. We neither authorise nor approve use of this material for any purpose other than facilitating problem solving at the Sphere Online Judge site; nor do we guarantee its fitness for any purpose whatsoever. The layout of the problems in this document is the copyright of the Editors named on the cover (as determined by the appropriate footers in the problem description). The content is the copyright of the respective Editor unless the copyright holder is otherwise stated in the ’resource’ section. The document as a whole is not protected by copyright, and fragments of it are to be regarded independently. No responsibility is taken by the Editors if use or redistribution of this document violates either their or third party copyright laws. When referring to or citing the whole or a fragment of this document, please state clearly the aforementioned URLs at which the document is to be found, as well as the resources from which the problems you are referring to originally came. Remarks concerning this document should be sent to the following e-mail address: [email protected]. 4Table of Contents 1. Problem TEST (1. Life, the Universe, and Everything) 2. Problem PRIME1 (2. Prime Generator) 3. Problem SBSTR1 (3. Substring Check (Bug Funny)) 4. Problem ONP (4. Transform the Expression) 5. Problem PALIN (5. The Next Palindrome) 6. Problem ARITH (6. Simple Arithmetics) 7. Problem BULK (7. The Bulk!) 8. Problem CMPLS (8. Complete the Sequence!) 9. Problem DIRVS (9. Direct Visibility) 10. Problem CMEXPR (10. Complicated Expressions) 11. Problem FCTRL (11. Factorial) 12. Problem MMIND (12. The Game of Master-Mind) 13. Problem HOTLINE (13. Hotline) 14. Problem IKEYB (14. I-Keyboard) 15. Problem SHPATH (15. The Shortest Path) 16. Problem TETRA (16. Sphere in a tetrahedron) 17. Problem CRYPTO1 (17. The Bytelandian Cryptographer (Act I)) 18. Problem CRYPTO2 (18. The Bytelandian Cryptographer (Act II)) 19. Problem CRYPTO3 (19. The Bytelandian Cryptographer (Act III)) 20. Problem CRYPTO4 (20. The Bytelandian Cryptographer (Act IV)) 21. Problem TRICENTR (22. Triangle From Centroid) 22. Problem PIR (23. Pyramids) 23. Problem FCTRL2 (24. Small factorials) 24. Problem POUR1 (25. Pouring water) 25. Problem BSHEEP (26. Build the Fence) 26. Problem SBANK (27. Sorting Bank Accounts) 27. Problem HMRO (28. Help the Military Recruitment Office!) 28. Problem HASHIT (29. Hash it!) 29. Problem BLINNET (30. Bytelandian Blingors Network) 30. Problem MUL (31. Fast Multiplication) 31. Problem NHAY (32. A Needle in the Haystack) 32. Problem TRIP (33. Trip) 33. Problem RUNAWAY (34. Run Away) 34. Problem EQBOX (35. Equipment Box) 35. Problem CODE1 (36. Secret Code) 36. Problem PROPKEY (37. The Proper Key) 37. Problem LABYR1 (38. Labyrinth) 38. Problem PIGBANK (39. Piggy-Bank) 39. Problem STONE (40. Lifting the Stone) 40. Problem WORDS1 (41. Play on Words) 41. Problem ADDREV (42. Adding Reversed Numbers) 42. Problem BOOKS1 (43. Copying Books) 43. Problem SCYPHER (44. Substitution Cipher) 44. Problem COMMEDIA (45. Commedia dell Arte) 45. Problem SCRAPER (47. Skyscraper Floors) 546. Problem BEADS (48. Glass Beads) 47. Problem HAREFOX (49. Hares and Foxes) 48. Problem INCARDS (50. Invitation Cards) 49. Problem TOUR (51. Fake tournament) 50. Problem JULKA (54. Julka) 51. Problem JASIEK (55. Jasiek) 52. Problem DYZIO (56. Dyzio) 53. Problem SUPPER (57. Supernumbers in a permutation) 54. Problem PICAD (58. Crime at Piccadily Circus) 55. Problem BIA (59. Bytelandian Information Agency) 56. Problem DANCE (60. The Gordian Dance) 57. Problem BRCKTS (61. Brackets) 58. Problem IMP (62. The Imp) 59. Problem SQRBR (63. Square Brackets) 60. Problem PERMUT1 (64. Permutations) 61. Problem BALL1 (65. Ball) 62. Problem CRSCNTRY (66. Cross-country) 63. Problem CUTOUT (67. Cutting out) 64. Problem EXPR1 (68. Expression) 65. Problem MOULDS (69. Moulds) 66. Problem RELATS1 (70. Relations) 67. Problem TREE1 (71. Tree) 68. Problem BAC (73. Bacterial) 69. Problem DIVSUM (74. Divisor Summation) 70. Problem EDIT1 (75. Editor) 71. Problem EDIT2 (76. Editor Inverse) 72. Problem BRICKS (77. New bricks disorder) 73. Problem MARBLES (78. Marbles) 74. Problem EASYPIE (82. Easy Problem) 75. Problem BUNDLE (83. Bundling) 76. Problem SHORTCUT (84. Shortcut) 77. Problem DICE1 (85. Dice Contest) 78. Problem RAIN1 (86. November Rain) 79. Problem FOOTBALL (87. Football) 80. Problem TREE2 (88. Which is Next) 81. Problem HANGLET (89. Hang or not to hang) 82. Problem MINIMAX (90. Minimizing maximizer) 83. Problem TWOSQRS (91. Two squares or not two squares) 84. Problem CUTSQRS (92. Cutting off Squares) 85. Problem MAYA (94. Numeral System of the Maya) 86. Problem STPAR (95. Street Parade) 87. Problem SHOP (96. Shopping) 88. Problem PARTY (97. Party Schedule) 89. Problem DFLOOR (98. Dance Floor) 90. Problem BUS (99. Bus) 91. Problem BABTWR (100. Tower of Babylon) 92. Problem FISHER (101. Fishmonger) 693. Problem LITEPIPE (102. GX Light Pipeline Inc) 94. Problem HIGH (104. Highways) 95. Problem ALICEBOB (105. Alice and Bob) 96. Problem BINSTIRL (106. Binary Stirling Numbers) 97. Problem MAYACAL (107. Calendar of the Maya) 98. Problem MORSE (108. Decoding Morse Sequences) 99. Problem EXCHNG (109. Exchanges) 100. Problem CISTFILL (110. Fill the Cisterns) 101. Problem SEGVIS (112. Horizontally Visible Segments) 102. Problem FAMILY (115. Family) 103. Problem INTERVAL (116. Intervals) 104. Problem RHOMBS (118. Rhombs) 105. Problem SERVERS (119. Servers) 106. Problem SOLIT (120. Solitaire) 107. Problem TTABLE (121. Timetable) 108. Problem STEVE (122. Voracious Steve) 109. Problem PAYING (123. Paying in Byteland) 110. Problem RENT (130. Rent your airplane and make money) 111. Problem SQDANCE (131. Square dance) 112. Problem HELPR2D2 (132. Help R2-D2!) 113. Problem PHONY (134. Phony Primes) 114. Problem MAWORK (135. Men at work) 115. Problem TRANS (136. Transformation) 116. Problem PARTIT (137. Partition) 117. Problem POSTERS (138. Election Posters) 118. Problem MAZE (139. The Long and Narrow Maze) 119. Problem LONER (140. The Loner) 120. Problem GLUE (142. Johnny and the Glue) 121. Problem ALIENS (145. Aliens) 122. Problem MULTIPLY (146. Fast Multiplication Again) 123. Problem TAUT (147. Tautology) 124. Problem MLAND (148. Land for Motorways) 125. Problem FSHEEP (149. Fencing in the Sheep) 126. Problem PLONK (150. Where to Drink the Plonk?) 127. Problem COURIER (151. The Courier) 128. Problem SCALES (153. Balancing the Stone) 129. Problem ROCK (154. Sweet and Sour Rock) 130. Problem PALSEC (160. Choosing a Palindromic Sequence) 131. Problem PAINTTMP (174. Paint templates) 132. Problem POLY1 (175. Polygon) 133. Problem SUM1SEQ (176. Sum of one-sequence) 134. Problem ABWORDS (177. AB-words) 135. Problem ROADNET (178. Road net) 136. Problem WORDEQ (179. Word equations) 137. Problem CONTPACK (180. How to pack containers) 138. Problem SCUBADIV (181. Scuba diver) 139. Problem WINDOW1 (182. Window) 7140. Problem ASCIRC (183. Assembler circuits) 141. Problem ATMS (184. Automatic Teller Machines) 142. Problem CHASE1 (185. Chase) 143. Problem LITELANG (186. The lightest language) 144. Problem FLBRKLIN (187. Flat broken lines) 145. Problem RECTNG1 (188. Rectangles) 146. Problem MUSKET (196. Musketeers) 147. Problem EMPTY (199. Empty Cuboids) 148. Problem MONODIG (200. Monodigital Representations) 149. Problem POLYGAME (201. The Game of Polygons) 150. Problem ROCKETS (202. Rockets) 151. Problem POTHOLE (203. Potholers) 152. Problem SLEEP (204. Sleepwalker) 153. Problem ICERINK (205. Icerink) 154. Problem BITMAP (206. Bitmap) 155. Problem THREECOL (207. Three-coloring of binary trees) 156. Problem STORE (208. Store-keeper) 157. Problem MAP (209. The Map) 158. Problem ALTARS (210. The Altars) 159. Problem PRIMIT (211. Primitivus recurencis) 160. Problem WATER (212. Water among Cubes) 161. Problem PANIC (215. Panic in the Plazas) 162. Problem SOPARADE (217. Soldiers on Parade) 163. Problem PHRASES (220. Relevant Phrases of Annihilation) 164. Problem VONNY (224. Vonny and her dominos) 165. Problem JEWELS (226. Jewelry and Fashion) 166. Problem ORDERS (227. Ordering the Soldiers) 167. Problem SHAMAN (228. Shamans) 168. Problem SORTING (229. Sorting is easy) 169. Problem ZEBRA (231. The Zebra Crossing) 170. Problem HOLIDAY1 (234. Getting Rid of the Holidays (Act I)) 171. Problem VFMUL (235. Very Fast Multiplication) 172. Problem ROMAN (236. Converting number formats) 173. Problem SUMITR (237. Sums in a Triangle) 174. Problem HOLIDAY2 (238. Getting Rid of the Holidays (Act II)) 175. Problem BTOUR (239. Tour de Byteland) 176. Problem BLOCKS (241. Arranging the Blocks) 177. Problem STABLEMP (243. Stable Marriage Problem) 178. Problem SQRROOT (245. Square Root) 179. Problem CHOCOLA (247. Chocolate) 180. Problem CTAIN (260. Containers) 181. Problem TRIPART (261. Triangle Partitioning) 182. Problem CONNECT (262. Connections) 183. Problem PERIOD (263. Period) 184. Problem CORNET (264. Corporative Network) 185. Problem CAVE (272. Cave Exploration) 186. Problem WMELON (274. Johnny and the Watermelon Plantation) 8187. Problem WATERWAY (275. The Water Ringroad) 188. Problem CTGAME (277. City Game) 189. Problem BICYCLE (278. Bicycle) 190. Problem INUMBER (279. Interesting number) 191. Problem LIFTS (280. Lifts) 192. Problem MUDDY (282. Muddy Fields) 193. Problem NAPTIME (283. Naptime) 194. Problem SCITIES (286. Selfish Cities) 195. Problem NETADMIN (287. Smart Network Administrator) 196. Problem PON (288. Prime or Not) 197. Problem POLYEQ (290. Polynomial Equations) 198. Problem CUBERT (291. Cube Root) 199. Problem ALIBB (292. Alibaba) 200. Problem OFBEAT (293. Officers on the Beat) 201. Problem TWORK (296. Teamwork is Crucial) 202. Problem AGGRCOW (297. Aggressive cows) 203. Problem CABLETV (300. Cable TV Network) 204. Problem BOOK (301. Booklets) 205. Problem CANTON (302. Count on Cantor) 206. Problem UCUBE (303. The Unstable Cube) 207. Problem RATTERN (309. The Room Pattern) 208. Problem PITPAIR (318. Pythagorean Legacy) 209. Problem WINDMILL (325. The Tall Windmills) 210. Problem PLATON (327. Platon and Socrates) 211. Problem BISHOPS (328. Bishops) 212. Problem CALLS (329. Calls) 213. Problem HARDQ (332. Hard Question) 214. Problem PHDISP (334. The Philosophical Dispute) 215. Problem EOPERA (336. Exchange Operations) 216. Problem SEQ (339. Recursive Sequence) 217. Problem POKER (344. Poker) 218. Problem MIXTURES (345. Mixtures) 219. Problem COINS (346. Bytelandian gold coins) 220. Problem EXPEDI (348. Expedition) 221. Problem AROUND (349. Around the world) 222. Problem LANDSCAP (350. Landscaping) 223. Problem HAN01 (351. Ha-noi!) 224. Problem ACT (359. Alpha Centauri Tennis) 225. Problem IGARB (362. Ignore the Garbage) 226. Problem LISA (364. Pocket Money) 227. Problem PHIDIAS (365. Phidias) 228. Problem FARMER (366. Farmer) 229. Problem EMPODIA (367. Empodia) 230. Problem CSTREET (368. Cobbled streets) 231. Problem MATH1 (369. Math I) 232. Problem ONEZERO (370. Ones and zeros) 233. Problem BENEFACT (372. The Benefactor) 9234. Problem GREED (373. Greedy island) 235. Problem MATRIX (374. Count maximum matrices) 236. Problem QTREE (375. Query on a tree) 237. Problem ACS (376. A concrete simulation) 238. Problem TAXI (377. Taxi) 239. Problem PERMUT2 (379. Ambiguous Permutations) 240. Problem BINGO (380. Bullshit Bingo) 241. Problem CHICAGO (381. 106 miles to Chicago) 242. Problem DECORATE (382. Decorate the wall) 243. Problem EUROPEAN (383. European railroad tracks) 244. Problem FOOL (384. Any fool can do it) 245. Problem GAME (385. Game schedule required) 246. Problem HELP (386. Help the problem setter) 247. Problem TOURS (387. Travelling tours) 248. Problem MENU (388. Menu) 249. Problem HOSPITAL (389. Use of Hospital Facilities) 250. Problem BILLIARD (390. Billiard) 251. Problem RAILROAD (391. Railroads) 252. Problem SPIN (392. Spin) 253. Problem HEXAGON (393. Hexagon) 254. Problem ACODE (394. Alphacode) 255. Problem APRIME (395. Anti-prime Sequences) 256. Problem HITOMISS (396. Hit or Miss) 257. Problem CONDUIT (397. I Conduit) 258. Problem RPGAMES (398. Roll Playing Games) 259. Problem TRANK (399. Team Rankings) 260. Problem TOANDFRO (400. To and Fro) 261. Problem TRANSL (401. Translations) 262. Problem HIKE (402. Hike on a Graph) 263. Problem FRACTION (403. Sort fractions) 264. Problem SCANNER (404. Scanner) 265. Problem TCUTTER (405. Tin Cutter) 266. Problem LOGIC (406. Logic) 267. Problem RNUMBER (407. Random Number) 268. Problem JRIDE (408. Jill Rides Again) 269. Problem DELCOMM (409. DEL Command) 270. Problem VHUFFM (410. Variable Radix Huffman Encoding) 271. Problem NUMQDW (411. Number of quite different words) 272. Problem COVER (412. K-path cover) 273. Problem WPUZZLES (413. Word Puzzles) 274. Problem BONFIRE (414. Equatorial Bonfire) 275. Problem DIV15 (416. Divisibility by 15) 276. Problem LAZYPROG (417. The lazy programmer) 277. Problem NECKLACE (418. Necklace) 278. Problem TRANSP (419. Transposing is Fun) 279. Problem AROAD (421. Another Road Problem) 280. Problem TRANSP2 (422. Transposing is Even More Fun) 10 281. Problem ASSIGN (423. Assignments) 282. Problem HAJIME (425. Kill evil instantly) 283. Problem PARTPALI (428. Particular Palindromes) 284. Problem TCNUMFL (449. Simple Numbers with Fractions Conversion) 285. Problem CLTZ (515. Collatz) 286. Problem ZZPERM (518. Zig-Zag Permutation) 287. Problem DIV (526. Divisors) 288. Problem DIV2 (530. Divisors 2) 289. Problem INCR (598. Increasing Subsequences) 290. Problem QUEST4 (660. Dungeon of Death) 291. Problem QUEST5 (661. Nail Them) 292. Problem SUBS (665. String it out) 293. Problem VOCV (666. Con-Junctions) 294. Problem LSORT (676. Sorting is not easy) 295. Problem BROW (677. A place for the brewery) 296. Problem HANOI07 (681. Building the Tower) 297. Problem PAIRINT (682. Pairs of Integers) 298. Problem ASSIGN4 (684. Another Assignment Problem) 299. Problem SEQPAR (685. Partition the sequence) 300. Problem REPEATS (687. Repeats) 301. Problem SAM (688. Toy Cars) 302. Problem LWAR (693. Lethal Warfare) 303. Problem DISUBSTR (694. Distinct Substrings) 304. Problem UFAST (695. Unite Fast) 305. Problem LIAR (696. Liar Liar) 306. Problem MWORDS (697. Matrix Words) 307. Problem PLHOP (698. Plane Hopping) 308. Problem HKNAP (699. Huge Knap Sack) 309. Problem BPRED (700. Branch Prediction) 310. Problem EXPAND (702. Barn Expansion) 311. Problem SERVICE (703. Mobile Service) 312. Problem PSTRING (704. Remove The String) 313. Problem SUBST1 (705. New Distinct Substrings) 314. Problem TFSETS (707. Triple-Free Sets) 315. Problem NICEDAY (709. The day of the competitors) 316. Problem PRO (726. Promotion) 317. Problem MAXIMUS (729. Move your armies) 318. Problem IVAN (734. Ivan and his interesting game) 319. Problem MDST (735. Minimum Diameter Spanning Tree) 320. Problem TREE (738. Another Counting Problem) 321. Problem NEG2 (739. The Moronic Cowmpouter) 322. Problem TRT (740. Treats for the Cows) 323. Problem STEAD (741. Steady Cow Assignment) 324. Problem LPERMUT (744. Longest Permutation) 325. Problem TEM (757. Thermal Luminescence) 326. Problem CH3D (760. Convex Hull 3D) 327. Problem MIS (764. Delay-noise Analysis) 11 328. Problem ARCHPLG (780. The Archipelago) 329. Problem TRIOPT (827. Trigonometric optimization) 330. Problem OPTM (839. Optimal Marks) 331. Problem WM06 (850. Soccer Choreography) 332. Problem SWAPS (861. Counting inversions) 333. Problem DNA (866. DNA Translation) 334. Problem CUBES (867. Perfect Cubes) 335. Problem IMPORT (869. Galactic Import) 336. Problem BASE (870. Basically Speaking) 337. Problem SEQUENCE (871. Letter Sequence Analysis) 338. Problem MARKUP (872. Mark-up) 339. Problem TRANSMIT (898. Transmitters) 340. Problem WSCIPHER (899. Ws Cipher) 341. Problem SPLIT (900. Split Windows) 342. Problem INDEXGEN (901. Index Generation) 343. Problem HANGOVER (902. Hangover) 344. Problem DOUBLEVI (903. Double Vision) 345. Problem IMAGE (904. Image Perimeters) 346. Problem MATRIX2 (912. Submatrix of submatrix) 347. Problem QTREE2 (913. Query on a tree II) 348. Problem FTOUR (944. Free Tour) 349. Problem IM (962. Intergalactic Map) 350. Problem EN (964. Entrapment) 351. Problem PB (967. Parking Bay) 352. Problem BIRTHDAY (972. Birthday) 353. Problem MOBILE (987. Mobile) 354. Problem MATRIOSH (999. Generalized Matrioshkas) 355. Problem EQDIV (1000. Equidivisions) 356. Problem BROUL (1001. Babylonian Roulette) 357. Problem UJ (1002. Uncle Jack) 358. Problem QUILT (1003. Little Quilt) 359. Problem POLYCODE (1004. Polygon Encoder) 360. Problem AIBOHP (1021. Aibohphobia) 361. Problem ANGELS (1022. Angels and Devils) 362. Problem COMCB (1024. Complete Chess Boards) 363. Problem FASHION (1025. Fashion Shows) 364. Problem FAVDICE (1026. Favorite Dice) 365. Problem FPOLICE (1027. Fool the Police) 366. Problem HUBULLU (1028. Hubulullu) 367. Problem MATSUM (1029. Matrix Summation) 368. Problem EIGHTS (1030. Triple Fat Ladies) 369. Problem UPSUB (1031. Up Subsequence) 370. Problem GSS1 (1043. Can you answer these queries I) 371. Problem CTRICK (1108. Card Trick) 372. Problem SUDOKU (1110. Sudoku) 373. Problem NSTEPS (1112. Number Steps) 374. Problem TOE1 (1161. Tic-Tac-Toe ( I ))

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