Codeforces Solutions

Contest 1520 - Codeforces Round #719 (Div. 3)

• 1520A - Do Not Be Distracted! (problem site)

Contest 1512 - Codeforces Round #713 (Div. 3)

• 1512A - Spy Detected! (problem site)

Contest 1475 - Codeforces Round #697 (Div. 3)

• 1475A - Odd Divisor (problem site)
• 1475B - New Year's Number (problem site)

Contest 1472 - Codeforces Round #693 (Div. 3)

• 1472A - Cards for Friends (problem site)

Contest 1462 - Codeforces Round #690 (Div. 3)

• 1462A - Favorite Sequence (problem site)
• 1463B - Last Year's Substring (problem site)
• 1462C - Unique Number (problem site)

Contest 1454 - Codeforces Round #686 (Div. 3)

• 1454A - Special Permutation (problem site)
• 1454B - Unique Bid Auction (problem site)
• 1454C - Sequence Transformation (problem site)
• 1454D - Number into Sequence (problem site)

Contest 1440 - Codeforces Round #684 (Div. 2)

• 1440A - Buy the String (problem site)

Contest 1433 - Codeforces Round #677 (Div. 3)

• 1433A - Boring Apartments (problem site)

Contest 1426 - Codeforces Round #674 (Div. 3)

• 1426A - Floor Number (problem site)

Contest 1421 - Codeforces Round #676 (Div. 2)

• 1421A - XORwice (problem site)

Contest 1409 - Codeforces Round #667 (Div. 3)

• 1409A - Yet Another Two Integers Problem (problem site)

Contest 1399 - Codeforces Round #661 (Div. 3)

• 1399A - Remove Smallest (problem site)
• 1399B - Gifts Fixing (problem site)

Contest 1385 - Codeforces Round #656 (Div. 3)

• 1385A - Three Pairwise Maximums (problem site)
• 1385B - Restore the Permutation by Merger (problem site)
• 1385C - Make It Good (problem site)
• 1385D - a-Good String (problem site)

Contest 1374 - Codeforces Round #653 (Div. 3)

• 1374A - Required Remainder (problem site)
• 1374B - Multiply by 2, divide by 6 (problem site)

Contest 1372 - Codeforces Round #655 (Div. 2)

• 1372A - Okmar and Completion (problem site)

Contest 1371 - Codeforces Round #654 (Div. 2)

• 1371A - Magical Sticks (problem site)

Contest 1370 - Codeforces Round #651 (Div. 2)

• 1370A - Maximum GCD (problem site)

Contest 1369 - Codeforces Round #652 (Div. 2)

• 1369A - FashionabLee (problem site)

Contest 1368 - Codeforces Global Round 8

• 1368A - C+= (problem site)
• 1368B - Codeforces Subsequences (problem site)

Contest 1367 - Codeforces Round #650 (Div. 3)

• 1367A - Short Substrings (problem site)
• 1367B - Even Array (problem site)
• 1367C - Social Distance (problem site)

Contest 1360 - Codeforces Round #644 (Div. 3)

• 1360A - Minimal Square (problem site)
• 1360B - Honest Coach (problem site)

Contest 1358 - Codeforces Round #645 (Div. 2)

• 1358A - Park Lighting (problem site)

Contest 1353 - Codeforces Round #642 (Div. 3)

• 1353A - Most Unstable Array (problem site)
• 1353B - Two Arrays And Swaps (problem site)

Contest 1352 - Codeforces Round #640 (Div. 4)

• 1352A - Sum of Round Numbers (problem site)
• 1352C - K-th Not Divisible by n (problem site)

Contest 1348 - Codeforces Round #638 (Div. 2)

• 1348A - Phoenix and Balance (problem site)

Contest 1343 - Codeforces Round #636 (Div. 3)

• 1343A - Candies (problem site)
• 1343B - Balanced Array (problem site)

Contest 1335 - Codeforces Round #634 (Div. 3)

• 1335A - Candies and Two Sisters (problem site)
• 1335B - Construct the String (problem site)

Contest 1328 - Codeforces Round #629 (Div. 3)

• 1328A - Divisibility Problem (problem site)

Contest 1327 - Educational Codeforces Round 84 (Rated for Div. 2)

• 1327A - Sum of Odd Integers (problem site)

Contest 1311 - Codeforces Round #624 (Div. 3)

• 1311A - Add Odd or Subtract Even (problem site)

Contest 1294 - Codeforces Round #615 (Div. 3)

• 1294A - Collecting Coins (problem site)

Contest 1283 - Codeforces Round #611 (Div. 3)

• 1283A - Minutes Before the New Year (problem site)

Contest 1234 - Codeforces Round #590 (Div. 3)

• 1234A - Equalize Prices Again (problem site)

Contest 1175 - Educational Codeforces Round 66 (Rated for Div. 2)

• 1175B - Catch Overflow! (problem site)

Contest 1154 - Codeforces Round #552 (Div. 3)

• 1154A - Restoring Three Numbers (problem site)

Contest 1152 - Codeforces Round #554 (Div. 2)

• 1152C - Neko does Maths (problem site)

Contest 1091 - Good Bye 2018

• 1091A - New Year and the Christmas Ornament (problem site)

Contest 1077 - Codeforces Round #521 (Div. 3)

• 1077A - Frog Jumping (problem site)

Contest 1056 - Mail.Ru Cup 2018 Round 3

• 1056A - Determine Line (problem site)
• 1056D - Decorate Apple Tree (problem site)

Contest 1030 - Technocup 2019 - Elimination Round 1

• 1030A - In Search of an Easy Problem (problem site)

Contest 996 - Codeforces Round #492 (Div. 2) [Thanks, uDebug!]

• 996A - Hit the Lottery (problem site)

Contest 990 - Educational Codeforces Round 45 (Rated for Div. 2)

• 990C - Bracket Sequences Concatenation Problem (problem site)

Contest 977 - Codeforces Round #479 (Div. 3)

• 977A - Wrong Subtraction (problem site)

Contest 913 - Hello 2018

• 913B - Christmas Spruce (problem site)

Contest 791 - Codeforces Round #405 (rated, Div. 2, based on VK Cup 2017 Round 1)

• 791A - Bear and Big Brother (problem site)

Contest 785 - Codeforces Round #404 (Div. 2)

• 785A - Anton and Polyhedrons (problem site)

Contest 768 - Divide by Zero 2017 and Codeforces Round 399 (Div. 1 + Div. 2, combined)

• 768E - Game of Stones (problem site)

Contest 758 - Codeforces Round #392 (Div. 2)

• 758A - Choliday Of Equality (problem site)

Contest 750 - Good Bye 2016

• 750A - New Year and Hurry (problem site)

Contest 749 - Codeforces Round #388 (Div. 2)

• 749A - Bachgold Problem (problem site)

Contest 743 - Codeforces Round 384 (Div. 2)

• 743B - Chloe and the sequence (problem site)

Contest 734 - Codeforces Round #379 (Div. 2)

• 734A - Anton and Danik (problem site)

Contest 732 - Codeforces Round #377 (Div. 2)

• 732A - Buy a Shovel (problem site)

Contest 731 - Codeforces Round #376 (Div. 2)

• 731A - Night at the Museum (problem site)
• 731C - Socks (problem site)

Contest 727 - Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2)

• 727A - Transformation: from A to B (problem site)
• 727B - Bill Total Value (problem site)

Contest 723 - Codeforces Round #375 (Div. 2)

• 723A - The New Year: Meeting Friends (problem site)

Contest 707 - Codeforces Round #368 (Div. 2)

• 707A - Brain's Photos (problem site)

Contest 706 - Codeforces Round #367 (Div. 2)

• 706B - Interesting drink (problem site)

Contest 705 - Codeforces Round #366 (Div. 2)

• 705A - Hulk (problem site)

Contest 703 - Codeforces Round #365 (Div. 2)

• 703A - Mishka and Game (problem site)

Contest 677 - Codeforces Round #355 (Div. 2)

• 677A - Vanya and Fence (problem site)

Contest 630 - Experimental Educational Round: VolBIT Formulas Blitz

• 630A - Again Twenty Five! (problem site)

Contest 617 - Codeforces Round #340 (Div. 2)

• 617A - Elephant (problem site)

Contest 584 - Codeforces Round #324 (Div. 2)

• 584A - Olesya and Rodion (problem site)

Contest 581 - Codeforces Round #322 (Div. 2)

• 581A - Vasya the Hipster (problem site)

Contest 580 - Codeforces Round #321 (Div. 2)

• 580A - Kefa and First Steps (problem site)
• 580C - Kefa and Park (problem site)

Contest 579 - Codeforces Round #320 (Div. 2) [Bayan Thanks-Round]

• 579A - Raising Bacteria (problem site)

Contest 550 - Codeforces Round #306 (Div. 2)

• 550A - Two Substrings (problem site)

Contest 546 - Codeforces Round #304 (Div. 2)

• 546A - Soldier and Bananas (problem site)

Contest 520 - Codeforces Round #295 (Div. 2)

• 520A - Pangram (problem site)
• 520B - Two Buttons (problem site)

Contest 510 - Codeforces Round #290 (Div. 2)

• 510A - Fox And Snake (problem site)

Contest 509 - Codeforces Round #289 (Div. 2, ACM ICPC Rules)

• 509A - Maximum in Table (problem site)

Contest 500 - Good Bye 2014

• 500A - New Year Transportation (problem site)

Contest 492 - Codeforces Round #280 (Div. 2)

• 492B - Vanya and Lanterns (problem site)

Contest 489 - Codeforces Round #277.5 (Div. 2)

• 489B - BerSU Ball (problem site)
• 489C - Given Length and Sum of Digits... (problem site)

Contest 486 - Codeforces Round #277 (Div. 2)

• 486A - Calculating Function (problem site)

Contest 479 - Codeforces Round #274 (Div. 2)

• 479A - Expression (problem site)

Contest 474 - Codeforces Round #271 (Div. 2)

• 474A - Keyboard (problem site)

Contest 472 - Codeforces Round #270

• 472A - Design Tutorial: Learn from Math (problem site)

Contest 469 - Codeforces Round #268 (Div. 2)

• 469A - I Wanna Be the Guy (problem site)

Contest 467 - Codeforces Round #267 (Div. 2)

• 467A - George and Accommodation (problem site)

Contest 466 - Codeforces Round #266 (Div. 2)

• 466A - Cheap Travel (problem site)

Contest 460 - Codeforces Round #262 (Div. 2)

• 460A - Vasya and Socks (problem site)

Contest 455 - Codeforces Round #260 (Div. 1)

• 455A - Boredom (problem site)

Contest 451 - Codeforces Round #258 (Div. 2)

• 451A - Game With Sticks (problem site)

Contest 443 - Codeforces Round #253 (Div. 2)

• 443A - Anton and Letters (problem site)

Contest 432 - Codeforces Round #246 (Div. 2)

• 432A - Choosing Teams (problem site)

Contest 431 - Codeforces Round #247 (Div. 2)

• 431A - Black Square (problem site)

Contest 427 - Codeforces Round #244 (Div. 2)

• 427A - Police Recruits (problem site)

Contest 409 - Codeforces Round #279 (Div. 2)

• 409A - Team Olympiad (problem site)

Contest 405 - Codeforces Round #238 (Div. 2)

• 405A - Gravity Flip (problem site)

Contest 379 - Good Bye 2013

• 379A - New Year Candles (problem site)

Contest 346 - Codeforces Round 201 (Div. 1)

• 346A - Alice and Bob (problem site)

Contest 344 - Codeforces Round #200 (Div. 2)

• 344A - Magnets (problem site)

Contest 340 - Codeforces Round #198 (Div. 2)

• 340A - The Wall (problem site)

Contest 339 - Codeforces Round #197 (Div. 2)

• 339A - Helpful Maths (problem site)
• 339B - Xenia and Ringroad (problem site)

Contest 337 - Codeforces Round #196 (Div. 2)

• 337A - Puzzles (problem site)

Contest 318 - Codeforces Round #188 (Div. 2)

• 318A - Even Odds (problem site)

Contest 313 - Codeforces Round #186 (Div. 2)

• 313A - Ilya and Bank Account (problem site)

Contest 282 - Codeforces Round #173 (Div. 2)

• 282A - Bit++ (problem site)

Contest 281 - Codeforces Round #172 (Div. 2)

• 281A - Word Capitalization (problem site)

Contest 271 - Codeforces Round #166 (Div. 2)

• 271A - Beautiful Year (problem site)

Contest 270 - Codeforces Round #165 (Div. 2)

• 270A - Fancy Fence (problem site)

Contest 268 - Codeforces Round #164 (Div. 2)

• 268A - Games (problem site)

Contest 266 - Codeforces Round #163 (Div. 2)

• 266A - Stones on the Table (problem site)
• 266B - Queue at the School (problem site)

Contest 263 - Codeforces Round #161 (Div. 2)

• 263A - Beautiful Matrix (problem site)

Contest 236 - Codeforces Round #146 (Div. 2)

• 236A - Boy or Girl (problem site)

Contest 231 - Codeforces Round #143 (Div. 2)

• 231A - Team (problem site)

Contest 230 - Codeforces Round #142 (Div. 2)

• 230A - Dragons (problem site)
• 230B - T-primes (problem site)

Contest 228 - Codeforces Round #141 (Div. 2)

• 228A - Is your horseshoe on the other hoof? (problem site)

Contest 208 - Codeforces Round #130 (Div. 2)

• 208A - Dubstep (problem site)

Contest 200 - Codeforces Round #126 (Div. 2)

• 200B - Drinks (problem site)

Contest 189 - Codeforces Round #119 (Div. 2)

• 189A - Cut Ribbon (problem site)

Contest 172 - Croc Champ 2012 - Qualification Round

• 172A - Phone Code (problem site)

Contest 160 - Codeforces Round #111 (Div. 2)

• 160A - Twins (problem site)

Contest 158 - VK Cup 2012 Qualification Round 1

• 158A - Next Round (problem site)
• 158B - Taxi (problem site)

Contest 157 - Codeforces Round 110 (Div. 2)

• 157B - Trace (problem site)

Contest 155 - Codeforces Round #109 (Div. 2)

• 155A - I_love_%username% (problem site)

Contest 148 - Codeforces Round #105 (Div. 2)

• 148A - Insomnia cure (problem site)

Contest 144 - Codeforces Round #103 (Div. 2)

• 144A - Arrival of the General (problem site)

Contest 141 - Codeforces Round #101 (Div. 2)

• 141A - Amusing Joke (problem site)

Contest 136 - Codeforces Beta Round #97 (Div. 2)

• 136A - Presents (problem site)

Contest 133 - Codeforces Beta Round #96 (Div. 2)

• 133A - HQ9+ (problem site)

Contest 131 - Codeforces Beta Round #95 (Div. 2)

• 131A - cAPS lOCK (problem site)

Contest 122 - Codeforces Beta Round #91 (Div. 2 Only)

• 122A - Lucky Division (problem site)

Contest 118 - Codeforces Beta Round #89 (Div. 2)

• 118A - String Task (problem site)

Contest 116 - Codeforces Beta Round #87 (Div. 2 Only)

• 116A - Tram (problem site)

Contest 112 - Codeforces Beta Round #85 (Div. 2 Only)

• 112A - Petya and Strings (problem site)

Contest 110 - Codeforces Beta Round #84 (Div. 2 Only)

• 110A - Nearly Lucky Number (problem site)

Contest 96 - Codeforces Beta Round #77 (Div. 2 Only)

• 96A - Football (problem site)

Contest 82 - Yandex.Algorithm 2011: Qualification 2

• 82A - Double Cola (problem site)

Contest 71 - Codeforces Beta Round #65 (Div. 2)

• 71A - Way Too Long Words (problem site)

Contest 69 - Codeforces Beta Round #63 (Div. 2)

• 69A - Young Physicist (problem site)

Contest 61 - Codeforces Beta Round #57 (Div. 2)

• 61A - Ultra-Fast Mathematician (problem site)

Contest 59 - Codeforces Beta Round #55 (Div. 2)

• 59A - Word (problem site)

Contest 58 - Codeforces Beta Round #54 (Div. 2)

• 58A - Chat room (problem site)

Contest 50 - Codeforces Beta Round #47

• 50A - Domino piling (problem site)

Contest 43 - Codeforces Beta Round #42 (Div. 2)

• 43A - Football (problem site)

Contest 41 - Codeforces Beta Round #40 (Div. 2)

• 41A - Translation (problem site)

Contest 34 - Codeforces Beta Round #34 (Div. 2)

• 34B - Sale (problem site)

Contest 27 - Codeforces Beta Round #27 (Codeforces format, Div. 2)

• 27A - Next Test (problem site)
• 27B - Tournament (problem site)

Contest 25 - Codeforces Beta Round #25 (Div. 2 Only)

• 25A - IQ test (problem site)

Contest 6 - Codeforces Beta Round #6 (Div. 2 Only)

• 6A - Triangle (problem site)

Contest 4 - Codeforces Beta Round #4 (Div. 2 Only)

• 4A - Watermelon (problem site)
• 4B - Before an Exam (problem site)
• 4C - Registration System (problem site)

Contest 1 - Codeforces Beta Round #1

• 1A - Theatre Square (problem site)