Codeforces problemset search & solutions
Exclude tags.

Review the problem statement from Codeforces (link will open a new tab). When you've matched your problem, go to the solutions.

Search on plain tags, ratings, names, and problem text. Example: brute force or binary search

1 2 3 >

Solved
Name
Tags
Solutions
Index
Contest
Type
Points
Tutorial
Rating Level
27175 Spreadsheet implementation math Statement B Codeforces Beta Round 1 {1} PROGRAMMING 85 1700
2022 Follow Traffic Rules implementation math Statement D Codeforces Beta Round 5 {5} PROGRAMMING C, D и E с CBR5 - разбор 2100
14635 Hexadecimal's Numbers brute force implementation math Statement C Codeforces Beta Round 9 (Div. 2 Only) {9} PROGRAMMING Codeforces Beta Round #9 tutorial 1500
16007 Increasing Sequence constructive algorithms implementation math Statement A Codeforces Beta Round 11 {11} PROGRAMMING 1100
9741 Numbers implementation math Statement A Codeforces Beta Round 13 {13} PROGRAMMING Codeforces Beta Round #13 editorial 1200
3946 Four Segments brute force constructive algorithms geometry implementation math Statement C Codeforces Beta Round 14 (Div. 2) {14} PROGRAMMING Codeforces Beta Round #14 tutorial 1800
1670 Intersection implementation math Statement B Codeforces Alpha Round 21 (Codeforces format) {21} PROGRAMMING 2300
1480 Sequence of points geometry implementation math Statement C Codeforces Beta Round 24 {24} PROGRAMMING Codeforces Beta Round #24 solutions 1800
693 Collisions brute force implementation math Statement E Codeforces Beta Round 34 (Div. 2) {34} PROGRAMMING Codeforces Beta Round #34 (Div. 2) Разбор 2100
4156 Chess brute force implementation math Statement B School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round 38 (ACM-ICPC Rules) {38} PROGRAMMING Школьная индивидуальная олимпиада #1 - Codeforces Beta Round #38. (Разбор задачи D) 1200
4549 Find Color constructive algorithms geometry implementation math Statement A Codeforces Beta Round 39 {40} PROGRAMMING codeforces #39 1300
367 Berland Square implementation math Statement C Codeforces Beta Round 39 {40} PROGRAMMING codeforces #39 2200
3971 Flea travel implementation math Statement A Codeforces Beta Round 51 {55} PROGRAMMING Round 51, A 1300
361 Table *special greedy implementation math Statement C Unknown Language Round 1 {64} PROGRAMMING 1700
2054 Harry Potter and Three Spells implementation math Statement A Codeforces Beta Round 60 {65} PROGRAMMING Codeforces Beta Round #60: tutorial 1800
209504 Young Physicist implementation math Statement A Codeforces Beta Round 63 (Div. 2) {69} PROGRAMMING Analysis Codeforces Beta Round #63 (Div. 2) 1100
5464 Progress Bar implementation math Statement B Codeforces Beta Round 65 (Div. 2) {71} PROGRAMMING Разбор задач Codeforces Beta Round #65 (Div. 2) 1400
2135 Big Maximum Sum data structures dp greedy implementation math trees Statement D Codeforces Beta Round 67 (Div. 2) {75} PROGRAMMING Codeforces Beta Round #67 (Div. 2) Editorial 2100
1940 Points implementation math Statement E All-Ukrainian School Olympiad in Informatics {76} PROGRAMMING All-Ukrainian School Olympiad in Informatics: editorial (A,B,C,D,E,F) 1700
32676 Double Cola implementation math Statement A Yandex.Algorithm 2011: Qualification 2 {82} PROGRAMMING 1889 1100
18010 Powerful array data structures implementation math two pointers Statement D Yandex.Algorithm 2011: Round 2 {86} PROGRAMMING Problemset analysis (Yandex, Round 2) 2700
5905 Trains implementation math Statement A Codeforces Beta Round 73 (Div. 1 Only) {87} PROGRAMMING CodeForces Beta Round #73 div. 1 analysis (particulary with div. 2) 1500
21882 Chips implementation math Statement A Codeforces Beta Round 75 (Div. 2 Only) {92} PROGRAMMING Analysis Codeforces Beta Round #75 800
5462 Friends graphs implementation math Statement B Codeforces Beta Round 76 (Div. 2 Only) {94} PROGRAMMING Analysis Beta Round #76 (Div. 2-A,B,C) 1400
855 Vectors implementation math Statement C Codeforces Beta Round 79 (Div. 1 Only) {101} PROGRAMMING Codeforces Beta Round 79, editoral 2100
6708 Testing Pants for Sadness greedy implementation math Statement A Codeforces Beta Round 80 (Div. 1 Only) {103} PROGRAMMING Tutorial 1200
4626 Petya and Square implementation math Statement B Codeforces Beta Round 85 (Div. 2 Only) {112} PROGRAMMING Разбор CFBR #85 Div. 1 C, D 1300
190 Sleeping combinatorics implementation math Statement E Codeforces Beta Round 86 (Div. 1 Only) {113} PROGRAMMING Codeforces Beta Round #86 Editorial 2600
2247 Elevator implementation math Statement A Codeforces Beta Round 88 {117} PROGRAMMING Codeforces Beta Round #88 (Editorial) 1400
1148 Before Exam constructive algorithms implementation sortings Statement B Codeforces Beta Round 90 {119} PROGRAMMING Разбор задачи E Codeforces Beta Round #90 1700
5756 Elevator brute force implementation math Statement A School Regional Team Contest, Saratov, 2011 {120} PROGRAMMING Tutorial for school regional team contest of Saratov 1000
4019 Winnie-the-Pooh and honey implementation math Statement C School Regional Team Contest, Saratov, 2011 {120} PROGRAMMING Tutorial for school regional team contest of Saratov 1100
7694 Opposites Attract implementation math Statement B Codeforces Beta Round 95 (Div. 2) {131} PROGRAMMING Some ideas for Round #95 (Div 2) 1300
5378 Ternary Logic implementation math Statement B Codeforces Beta Round 97 (Div. 2) {136} PROGRAMMING Codeforces Beta Round #97: editorial 1200
1421 Last Chance data structures implementation strings Statement E Codeforces Beta Round 98 (Div. 2) {137} PROGRAMMING Codeforces Beta Round #98 (Div. 2): Editorial 2000
1471 Wallpaper implementation math Statement B Codeforces Beta Round 99 (Div. 2) {139} PROGRAMMING Codeforces Beta Round #99: editorial 1600
6094 Escape implementation math Statement B Codeforces Round 105 (Div. 2) {148} PROGRAMMING Codeforces Round #105 (Div. 2): editorial 1500
116317 Insomnia cure constructive algorithms implementation math Statement A Codeforces Round 105 (Div. 2) {148} PROGRAMMING Codeforces Round #105 (Div. 2): editorial 900
99075 Soft Drinking implementation math Statement A Codeforces Round 107 (Div. 2) {151} PROGRAMMING Codeforces Round #107. Tutorial. 900
3777 Find Pair implementation math sortings Statement C Codeforces Round 111 (Div. 2) {160} PROGRAMMING Codeforces Round #111 (Div. 2) Разбор Задач 1700
11660 Wizards and Demonstration implementation math Statement A Codeforces Round 114 (Div. 2) {168} PROGRAMMING Codeforces Round #114 — Tutorial 1000
2566 Rock-Paper-Scissors implementation math Statement A Croc Champ 2012 - Round 1 {173} PROGRAMMING Croc Champ 2012 — Round 1 — Editorial 1300
2893 Mathematical Analysis Rocks! constructive algorithms implementation math Statement F Codeforces Round 116 (Div. 2, ACM-ICPC Rules) {180} PROGRAMMING 1300
9452 Common Divisors brute force hashing implementation math strings Statement D Codeforces Round 117 (Div. 2) {182} PROGRAMMING Codeforces Round #117 (Div. 2) Разбор Задач 1400
531 LCM *special implementation math Statement C Surprise Language Round 6 {188} PROGRAMMING Surprise Language Round #6: editorial 1400
11073 Exams implementation math Statement A Codeforces Round 122 (Div. 2) {194} PROGRAMMING Editoral Codeforces Round #122 1000
5554 After Training data structures implementation math Statement B Codeforces Round 123 (Div. 2) {195} PROGRAMMING Codeforces Round #123 (Div. 2) Разбор Задач 1300
3355 About Bacteria implementation math Statement A Codeforces Round 125 (Div. 1) {198} PROGRAMMING Solutions for Codeforces Round #125 1700
374 Tractor College implementation math number theory ternary search Statement E Codeforces Round 126 (Div. 2) {200} PROGRAMMING Editorial of Codeforces Round #126 (Div. 2) 2200
155080 Drinks implementation math Statement B Codeforces Round 126 (Div. 2) {200} PROGRAMMING Editorial of Codeforces Round #126 (Div. 2) 700
1523 Hit Ball geometry implementation math Statement D Codeforces Round 128 (Div. 2) {203} PROGRAMMING 1700
5341 Tiling with Hexagons implementation math Statement A Codeforces Round 133 (Div. 2) {216} PROGRAMMING Editorial for Codeforces Round #133 1300
17048 Little Elephant and Function implementation math Statement A Codeforces Round 136 (Div. 2) {221} PROGRAMMING Codeforces Round #136 — Editorial 1000
3088 Reducing Fractions implementation math number theory sortings Statement C Codeforces Round 137 (Div. 2) {222} PROGRAMMING Разбор задач Codeforces Round #137 (Div. 2) 2000
1052 Anniversary data structures implementation math matrices number theory Statement C Codeforces Round 140 (Div. 1) {226} PROGRAMMING Codeforces Round #140 Editorial 2100
101154 T-primes binary search implementation math number theory Statement B Codeforces Round 142 (Div. 2) {230} PROGRAMMING Codeforces Round #142 Problem Analysis 1300
50329 Perfect Permutation implementation math Statement A Codeforces Round 144 (Div. 2) {233} PROGRAMMING Editorial for Codeforces Round #144 800
994 Number Challenge combinatorics dp implementation math number theory Statement E Codeforces Round 146 (Div. 1) {235} PROGRAMMING Codeforces Round #146 Tutorial 2600
20934 Two Bags of Potatoes greedy implementation math Statement A Codeforces Round 148 (Div. 2) {239} PROGRAMMING Editorial for Codeforces Round #148 1200
1388 Playing with Permutations implementation math Statement B Codeforces Round 153 (Div. 1) {251} PROGRAMMING Editorial of Codeforces Round #153 1900
2222 Mr. Bender and Square binary search implementation math Statement D Codeforces Round 156 (Div. 2) {255} PROGRAMMING Codeforces Round #156 tutorial 1900
1027 Furlo and Rublo and Game games implementation math Statement E Codeforces Round 156 (Div. 2) {255} PROGRAMMING Codeforces Round #156 tutorial 2200
16847 Adding Digits implementation math Statement A Codeforces Round 158 (Div. 2) {260} PROGRAMMING Codeforces Round #158 (Div. 2) Tutorial 1400
36458 Buttons implementation math Statement B Codeforces Round 164 (Div. 2) {268} PROGRAMMING Codeforces Round #164 (Div. 2) — Разбор задач 1000
52029 Fancy Fence geometry implementation math Statement A Codeforces Round 165 (Div. 2) {270} PROGRAMMING Разбор Codeforces Round #165 1200
28193 Dima and Friends implementation math Statement A Codeforces Round 167 (Div. 2) {272} PROGRAMMING Codeforces Round #167 tutorial 1000
4336 Dima and Sequence implementation math Statement B Codeforces Round 167 (Div. 2) {272} PROGRAMMING Codeforces Round #167 tutorial 1400
16984 Little Girl and Maximum XOR bitmasks dp greedy implementation math Statement D Codeforces Round 169 (Div. 2) {276} PROGRAMMING Codeforces Round #169 — Unofficial Editorial 1800
5602 Game on Tree implementation math probabilities trees Statement C Codeforces Round 172 (Div. 1) {280} PROGRAMMING T 2400
350 Sequence Transformation data structures dp implementation math Statement E Codeforces Round 172 (Div. 1) {280} PROGRAMMING Codeforces Round #172 Editorial 3000
10412 XOR and OR constructive algorithms implementation math Statement C Codeforces Round 173 (Div. 2) {282} PROGRAMMING Round #173 — Editorial 1600
7503 Cows and Primitive Roots implementation math number theory Statement A Codeforces Round 174 (Div. 2) {284} PROGRAMMING Editorial for Codeforces #174 1400
2476 Polo the Penguin and XOR operation implementation math Statement C Codeforces Round 177 (Div. 1) {288} PROGRAMMING Codeforces Round #177, editorial 1900
413 Polo the Penguin and Lucky Numbers dp implementation math Statement E Codeforces Round 177 (Div. 1) {288} PROGRAMMING Codeforces Round #177, editorial 2800
28992 Shaass and Oskols implementation math Statement A Codeforces Round 178 (Div. 2) {294} PROGRAMMING Codeforces Round #178 Editorial 900
8667 Lucky Permutation Triple constructive algorithms implementation math Statement A Codeforces Round 183 (Div. 1) {303} PROGRAMMING Codeforces Round #183 Editorial 1400
1440 Rectangle Puzzle II implementation math Statement B Codeforces Round 183 (Div. 1) {303} PROGRAMMING Codeforces Round #183 Editorial 1900
2322 Continued Fractions brute force implementation math Statement B Codeforces Round 184 (Div. 2) {305} PROGRAMMING 7712 1600
6010 Ilya and Matrix constructive algorithms greedy implementation sortings Statement C Codeforces Round 186 (Div. 2) {313} PROGRAMMING Tutorial 1400
66888 Ilya and Bank Account implementation number theory Statement A Codeforces Round 186 (Div. 2) {313} PROGRAMMING Tutorial 900
3935 Ciel and Robot binary search implementation math Statement A Codeforces Round 190 (Div. 1) {321} PROGRAMMING Codeforces Round #190 — Editorial 1700
10781 Vasily the Bear and Triangle implementation math Statement A Codeforces Round 195 (Div. 2) {336} PROGRAMMING Tutorial Codeforces Round #195 (Div. 2) 1100
289064 Helpful Maths greedy implementation sortings strings Statement A Codeforces Round 197 (Div. 2) {339} PROGRAMMING Codeforces Round #197 — Tutorial 900
4752 Tourist Problem combinatorics implementation math Statement C Codeforces Round 198 (Div. 2) {340} PROGRAMMING Tutorial 1700
9962 Fixed Points brute force implementation math Statement B Codeforces Round 201 (Div. 2) {347} PROGRAMMING Codeforces Round #201 Editorial 1200
3113 Jeff and Rounding dp greedy implementation math Statement A Codeforces Round 204 (Div. 1) {351} PROGRAMMING Codeforces Round #204 — tutorial 1900
29118 Jeff and Digits brute force implementation math Statement A Codeforces Round 204 (Div. 2) {352} PROGRAMMING 1100
20222 Domino implementation math Statement A Codeforces Round 205 (Div. 2) {353} PROGRAMMING 9145 1300
5310 Find Maximum implementation math number theory Statement C Codeforces Round 205 (Div. 2) {353} PROGRAMMING 9145 1600
2449 Two Heaps combinatorics constructive algorithms greedy implementation math sortings Statement B Codeforces Round 205 (Div. 2) {353} PROGRAMMING 9145 1800
2122 Xenia and Hamming implementation math Statement B Codeforces Round 207 (Div. 1) {356} PROGRAMMING 9210 2000
2053 Insertion Sort data structures dp implementation math Statement C Codeforces Round 212 (Div. 2) {362} PROGRAMMING Codeforces Round #212 (Div. 2). Tutorial. Part 1. 2000
876 Dima and Magic Guitar brute force implementation math Statement E Codeforces Round 214 (Div. 2) {366} PROGRAMMING Codeforces Round #214 (Div. 2) — Tutorial 2300
6936 Valera and Contest constructive algorithms implementation math Statement B Codeforces Round 216 (Div. 2) {369} PROGRAMMING Editorial Codeforces Round #216 (Div. 2) 1500
6784 K-Periodic Array greedy implementation math Statement A Codeforces Round 218 (Div. 2) {371} PROGRAMMING Codeforces Round #218 (Div. 2): Tutorial 1200
2825 Making Sequences is Fun binary search implementation math Statement B Codeforces Round 219 (Div. 2) {373} PROGRAMMING Codeforces Round #219 editorial 1600
675 Red and Black Tree dp implementation math Statement E Codeforces Round 221 (Div. 1) {375} PROGRAMMING Codeforces Round #221 Tutorial 3000
9994 Lever implementation math Statement A Codeforces Round 221 (Div. 2) {376} PROGRAMMING Codeforces Round #221 Tutorial 1000
10983 Bear and Strings brute force greedy implementation math strings Statement B Codeforces Round 226 (Div. 2) {385} PROGRAMMING Codeforces Round #226 (Div. 2) — Editorial 1300
10874 Bear and Prime Numbers binary search brute force data structures dp implementation math number theory Statement C Codeforces Round 226 (Div. 2) {385} PROGRAMMING Codeforces Round #226 (Div. 2) — Editorial 1800
2621 Fox and Minimal path bitmasks constructive algorithms graphs implementation math Statement B Codeforces Round 228 (Div. 1) {388} PROGRAMMING Codeforces Round #228 — Editorial 2000
300 Physical Education and Buns brute force implementation math Statement D Codeforces Round 231 (Div. 2) {394} PROGRAMMING 2000.0
836 On Corruption and Numbers constructive algorithms implementation math Statement B Codeforces Round 232 (Div. 2) {397} PROGRAMMING 1000.0 Codeforces Round #232 Editorial (restored)
3037 Inna and Huge Candy Matrix implementation math Statement C Codeforces Round 234 (Div. 2) {400} PROGRAMMING Codeforces Round #234 (Div. 2) — Tutorial 1500
4644 Sereja and Contests greedy implementation math Statement B Codeforces Round 235 (Div. 2) {401} PROGRAMMING Codeforces Round #235 (Div. 2) — Tutorial 1200
17599 Vanya and Cards implementation math Statement A Codeforces Round 235 (Div. 2) {401} PROGRAMMING Codeforces Round #235 (Div. 2) — Tutorial 900
3066 Marathon implementation math Statement B Codeforces Round 237 (Div. 2) {404} PROGRAMMING Codeforces Round #237 (Div. 2) Editorial 1500
4977 Unusual Product implementation math Statement C Codeforces Round 238 (Div. 2) {405} PROGRAMMING Codeforces Round #238 Tutorial 1600
3302 Toy Sum greedy implementation math Statement D Codeforces Round 238 (Div. 2) {405} PROGRAMMING Codeforces Round #238 Tutorial 1900
408 Hamming Triples implementation math two pointers Statement E Codeforces Round 238 (Div. 1) {406} PROGRAMMING Codeforces Round #238 Tutorial 2700
5221 Triangle brute force geometry implementation math Statement A Codeforces Round 239 (Div. 1) {407} PROGRAMMING Codeforces Round #239 Editorial 1700
1259 Curious Array brute force combinatorics implementation math Statement C Codeforces Round 239 (Div. 1) {407} PROGRAMMING Codeforces Round #239 Editorial 2500
6743 Mashmokh and Tokens binary search greedy implementation math Statement B Codeforces Round 240 (Div. 2) {415} PROGRAMMING Codeforces Round #240 Editorial 1500
1166 Population Size greedy implementation math Statement D Codeforces Round 241 (Div. 2) {416} PROGRAMMING Codeforces Round #241 — editorial 2300
3451 Elimination dp implementation math Statement A RCC 2014 Warmup (Div. 2) {417} PROGRAMMING RCC 2014 WarmUp Analysis 1500
1686 Police Patrol greedy implementation math ternary search Statement E Codeforces Round 244 (Div. 2) {427} PROGRAMMING Codeforces Round #244 (Div. 2) Editorial 2000
2644 Ryouko's Memory Note implementation math sortings Statement C Codeforces Round 248 (Div. 2) {433} PROGRAMMING Codeforces Round #248 Editorial 1900
3183 Om Nom and Spiders implementation math Statement B Zepto Code Rush 2014 {436} PROGRAMMING Zepto Code Rush 2014 — solutions A-D 1400
1269 Valera and Swaps constructive algorithms dsu graphs implementation math string suffix structures Statement D Codeforces Round 252 (Div. 2) {441} PROGRAMMING Разбор Codeforces Round #252 (Div. 2) 2300
29348 Jzzhu and Sequences implementation math Statement B Codeforces Round 257 (Div. 2) {450} PROGRAMMING Codeforces Round #257 Editorial 1400
3606 Predict Outcome of the Game brute force implementation math Statement C Codeforces Round 258 (Div. 2) {451} PROGRAMMING Codeforces Round #258 Editorial 1700
53238 Vasya and Socks brute force implementation math Statement A Codeforces Round 262 (Div. 2) {460} PROGRAMMING 13465 1000
13570 Little Dima and Equation brute force implementation math number theory Statement B Codeforces Round 262 (Div. 2) {460} PROGRAMMING 13465 1500
30449 Caisa and Pylons brute force implementation math Statement B Codeforces Round 264 (Div. 2) {463} PROGRAMMING CF 264 Div 2 Tutorial 1200
53115 Dreamoon and Stairs implementation math Statement A Codeforces Round 272 (Div. 2) {476} PROGRAMMING Editorial 1100
25169 Counterexample brute force implementation math number theory Statement A Codeforces Round 275 (Div. 2) {483} PROGRAMMING Codeforces Round #275 Editorial 1100
677 Strange Sorting implementation math Statement C Codeforces Round 276 (Div. 1) {484} PROGRAMMING Codeforces Round #276 — Editorial 2600
8860 Factory implementation math matrices Statement A Codeforces Round 276 (Div. 2) {485} PROGRAMMING Codeforces Round #276 — Editorial 1400
161659 Calculating Function implementation math Statement A Codeforces Round 277 (Div. 2) {486} PROGRAMMING Codeforces Round #277(Div. 2) Editorial 1100
73741 Team Olympiad greedy implementation sortings Statement A Codeforces Round 279 (Div. 2) {490} PROGRAMMING Codeforces Round #279 (Div. 2) Editorial 900
93880 Vanya and Lanterns binary search implementation math sortings Statement B Codeforces Round 280 (Div. 2) {492} PROGRAMMING Разбор задач 1200
3338 Vanya and Computer Game binary search implementation math sortings Statement D Codeforces Round 280 (Div. 2) {492} PROGRAMMING Разбор задач 1800
17307 Minimum Difficulty brute force implementation math Statement A Codeforces Round 283 (Div. 2) {496} PROGRAMMING Codeforces Round #283: editorial (with bonuses!) 1000
6063 New Year Book Reading constructive algorithms greedy implementation math Statement C Good Bye 2014 {500} PROGRAMMING Tutorial 2 1600
4607 Guess Your Way Out! implementation math trees Statement C Codeforces Round 287 (Div. 2) {507} PROGRAMMING Editorial 1700
22911 Han Solo and Lazer Gun brute force data structures geometry implementation math Statement B Codeforces Round 291 (Div. 2) {514} PROGRAMMING Codeforces Round #291 (Div. 2) Editorial 1400
1083 Arthur and Questions greedy implementation math ternary search Statement E Codeforces Round 293 (Div. 2) {518} PROGRAMMING 2400
20880 A and B and Team Training greedy implementation math number theory Statement C Codeforces Round 294 (Div. 2) {519} PROGRAMMING Editorial 1300
65995 Two Buttons dfs and similar graphs greedy implementation math shortest paths Statement B Codeforces Round 295 (Div. 2) {520} PROGRAMMING Codeforces Round #295 Editorial (now with bonuses!) 1400
15800 Playing with Paper implementation math Statement A Codeforces Round 296 (Div. 2) {527} PROGRAMMING Codeforces Round #296 Editorial 1100
2467 Board Game games greedy implementation math Statement C VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) {533} PROGRAMMING Разбор VK Cup Round 2 1700
13012 Exam constructive algorithms implementation math Statement A Codeforces Round 298 (Div. 2) {534} PROGRAMMING 1100
6176 Tourist's Notes binary search brute force greedy implementation math Statement C Codeforces Round 300 {538} PROGRAMMING Codeforces Round #300 Editorial (+challenges) 1600
247134 Soldier and Bananas brute force implementation math Statement A Codeforces Round 304 (Div. 2) {546} PROGRAMMING Codeforces Round #304 (Div.2) editorial 800
2808 Mike and Frog brute force greedy implementation math Statement A Codeforces Round 305 (Div. 1) {547} PROGRAMMING Codeforces Round #305 Editorial 1900
1528 Brackets in Implications constructive algorithms greedy implementation math Statement E Codeforces Round 306 (Div. 2) {550} PROGRAMMING Codeforces Round #306 (Div. 2) Editorial 2300
2150 GukiZ and Binary Operations combinatorics implementation math matrices number theory Statement D Codeforces Round 307 (Div. 2) {551} PROGRAMMING Tutorial 2400
10311 Vanya and Table implementation math Statement A Codeforces Round 308 (Div. 2) {552} PROGRAMMING Codeforces #308 (Div. 2) Editorial 1100
16182 Vanya and Books implementation math Statement B Codeforces Round 308 (Div. 2) {552} PROGRAMMING Codeforces #308 (Div. 2) Editorial 1300
1773 Vanya and Brackets brute force dp expression parsing greedy implementation strings Statement E Codeforces Round 308 (Div. 2) {552} PROGRAMMING Codeforces #308 (Div. 2) Editorial 2300
2298 Kyoya and Permutation binary search combinatorics constructive algorithms greedy implementation math Statement B Codeforces Round 309 (Div. 1) {553} PROGRAMMING Codeforces Round #309 Editorial 2200
965 Case of a Top Secret binary search implementation math Statement D Codeforces Round 310 (Div. 1) {555} PROGRAMMING Codeforces Round #310 Editorial 2500
8553 Ilya and Diplomas greedy implementation math Statement A Codeforces Round 311 (Div. 2) {557} PROGRAMMING Codeforces Round #311 (Div.2) Editorial 1200
7535 Pasha and Tea constructive algorithms implementation math sortings Statement B Codeforces Round 311 (Div. 2) {557} PROGRAMMING Codeforces Round #311 (Div.2) Editorial 1500
5436 Primes or Palindromes? brute force implementation math number theory Statement A Codeforces Round 315 (Div. 1) {568} PROGRAMMING Codeforces Round #315 Editorial 1700
5091 Music implementation math Statement A Codeforces Round 315 (Div. 2) {569} PROGRAMMING Codeforces Round #315 Editorial 1500
17008 Simple Game constructive algorithms games greedy implementation math Statement B Codeforces Round 316 (Div. 2) {570} PROGRAMMING Codeforces Round #316 Editorial 1300
2745 Lengthening Sticks combinatorics implementation math Statement A Codeforces Round 317 [AimFund Thanks-Round] (Div. 1) {571} PROGRAMMING Codeforces Round #317 [AimFund Thanks-Round] Editorial 2300
18910 Bear and Poker implementation math number theory Statement A Codeforces Round 318 [RussianCodeCup Thanks-Round] (Div. 1) {573} PROGRAMMING Codeforces Round #318 [RussianCodeCup Thanks-Round] Editorial 1400
13761 Luxurious Houses implementation math Statement B Codeforces Round 322 (Div. 2) {581} PROGRAMMING Codeforces Round #322 (Div.2) Editorial 1200
7679 Developing Skills implementation math sortings Statement C Codeforces Round 322 (Div. 2) {581} PROGRAMMING Codeforces Round #322 (Div.2) Editorial 1400
5019 Three Logos bitmasks brute force constructive algorithms geometry implementation math Statement D Codeforces Round 322 (Div. 2) {581} PROGRAMMING Codeforces Round #322 (Div.2) Editorial 1700
87428 Vasya the Hipster implementation math Statement A Codeforces Round 322 (Div. 2) {581} PROGRAMMING Codeforces Round #322 (Div.2) Editorial 700
17489 Wizards' Duel implementation math Statement A Codeforces Round 327 (Div. 2) {591} PROGRAMMING 900
10083 Saitama Destroys Hotel implementation math Statement A Codeforces Round 336 (Div. 2) {608} PROGRAMMING Codeforces Round #336 Editorial 1100
7532 Load Balancing implementation math Statement C Educational Codeforces Round 3 {609} PROGRAMMING Editorial 1500
7686 HDD is Outdated Technology implementation math Statement B Educational Codeforces Round 4 {612} PROGRAMMING 22299 1200
7371 Gena's Code implementation math Statement B Codeforces Round 339 (Div. 2) {614} PROGRAMMING Tutorial 1400
1111 Hexagons binary search implementation math Statement E Codeforces Round 338 (Div. 2) {615} PROGRAMMING Codeforces Round #338 (Div. 2) editorial 2200
3785 Sum of Remainders implementation math number theory Statement E Educational Codeforces Round 5 {616} PROGRAMMING Editorial of Educational Codeforces Round 5 2200
14841 Professor GukiZ's Robot implementation math Statement A Educational Codeforces Round 6 {620} PROGRAMMING Editorial of Educational Codeforces Round 6 1000
10358 Infinite Sequence implementation math Statement A Educational Codeforces Round 7 {622} PROGRAMMING Editorial of Educational Codeforces Round 7 1100
5692 Guest From the Past implementation math Statement A Codeforces Round 342 (Div. 2) {625} PROGRAMMING Codeforces Round #342 (Div. 2) : editorial 1700
710 Finals in arithmetic constructive algorithms implementation math Statement D Codeforces Round 342 (Div. 2) {625} PROGRAMMING Codeforces Round #342 (Div. 2) : editorial 2400
4119 Cracking the Code implementation math Statement L Experimental Educational Round: VolBIT Formulas Blitz {630} PROGRAMMING Разбор задач Experimental Educational Round: VolBIT Formulas Blitz 1700
3095 Fibonacci-ish brute force dp hashing implementation math Statement D Manthan, Codefest 16 {633} PROGRAMMING Manthan, Codefest 16: Editorials 2000
1270 Bear and Polynomials hashing implementation math Statement C VK Cup 2016 - Round 1 {639} PROGRAMMING Tutorial 2200
1608 Little Artem and Random Variable dp implementation math probabilities Statement D VK Cup 2016 - Round 2 {641} PROGRAMMING VK Cup 2016 — Раунд 2 (editorial) 2300
24360 Joysticks dp greedy implementation math Statement A Codeforces Round 345 (Div. 2) {651} PROGRAMMING 1100
5326 Gabriel and Caterpillar implementation math Statement A Educational Codeforces Round 10 {652} PROGRAMMING Editorial of Educational Codeforces Round 10 1400
17045 Round House implementation math Statement A Codeforces Round 346 (Div. 2) {659} PROGRAMMING Editorial for Codeforces Round #346 (Div. 2) 1100
6786 Bicycle Race geometry implementation math Statement D Codeforces Round 346 (Div. 2) {659} PROGRAMMING Editorial for Codeforces Round #346 (Div. 2) 1500
10727 Co-prime Array greedy implementation math number theory Statement A Educational Codeforces Round 11 {660} PROGRAMMING Editorial of Educational Codeforces Round 11 1300
1739 International Olympiad constructive algorithms greedy implementation math Statement D CROC 2016 - Final Round [Private, For Onsite Finalists Only] {662} PROGRAMMING Editorial for CROC 2016 Finals and Codeforces Round #347 2000
5875 Pyramid of Glasses implementation math math Statement B Codeforces Round 354 (Div. 2) {676} PROGRAMMING Editorial 1500
7994 Vanya and Food Processor implementation math Statement B Codeforces Round 355 (Div. 2) {677} PROGRAMMING Codeforces Round #355 (Div. 2) Editorial 1400
15497 Johny Likes Numbers implementation math Statement A Educational Codeforces Round 13 {678} PROGRAMMING Editorial 1000
11296 Joty and Chocolate implementation math number theory Statement C Educational Codeforces Round 13 {678} PROGRAMMING Editorial 1600
407 Bear and Chase brute force dfs and similar graphs implementation math probabilities Statement D Codeforces Round 356 (Div. 1) {679} PROGRAMMING Codeforces Round #356 — Editorial 2900
2321 PLEASE combinatorics dp implementation math matrices Statement C Codeforces Round 362 (Div. 1) {696} PROGRAMMING Codeforces Round #362 (Editorial) 2200
13498 Pineapple Incident implementation math Statement A Codeforces Round 362 (Div. 2) {697} PROGRAMMING 1000
6065 Barnicle brute force implementation math strings Statement B Codeforces Round 362 (Div. 2) {697} PROGRAMMING 1400
14063 Powers of Two brute force data structures implementation math Statement B Educational Codeforces Round 15 {702} PROGRAMMING 46324 1500
6101 Mishka and trip implementation math Statement B Codeforces Round 365 (Div. 2) {703} PROGRAMMING Codeforces Round #365 (Div. 2) Editorial 1400
621 Black Widow dp graphs implementation math Statement C Codeforces Round 366 (Div. 1) {704} PROGRAMMING Tutorial 2800
3484 Recover the String constructive algorithms greedy implementation math Statement B AIM Tech Round 3 (Div. 1) {708} PROGRAMMING Editorial 1900
12692 Memory and Crow implementation math Statement A Codeforces Round 370 (Div. 2) {712} PROGRAMMING Codeforces Round #370 Editorial 900
11213 Meeting of Old Friends implementation math Statement A Codeforces Round 371 (Div. 2) {714} PROGRAMMING Codeforces Round #371 Editorial 1100
4645 Efim and Strange Grade dp implementation math Statement A Codeforces Round 373 (Div. 1) {718} PROGRAMMING Codeforces Round #373 — Editorial 1700
12547 Passwords implementation math sortings strings Statement B Codeforces Round 374 (Div. 2) {721} PROGRAMMING Codeforces Round #374 (Div. 2) Editorial 1200
105197 The New Year: Meeting Friends implementation math sortings Statement A Codeforces Round 375 (Div. 2) {723} PROGRAMMING Codeforces Round #375 (Div.2) Editorial 800
4271 Batch Sort brute force greedy implementation math Statement B Intel Code Challenge Final Round (Div. 1 + Div. 2, Combined) {724} PROGRAMMING Tutorial 1500
2297 Ray Tracing greedy hashing implementation math number theory sortings Statement C Intel Code Challenge Final Round (Div. 1 + Div. 2, Combined) {724} PROGRAMMING Tutorial 1800
5376 Food on the Plane implementation math Statement B Canada Cup 2016 {725} PROGRAMMING 1200
965 Running Over The Bridges greedy implementation math Statement D 2016-2017 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) {730} PROGRAMMING Разбор задач (видео, по-русски) 2400
3201 Video Cards brute force data structures implementation math number theory Statement F Codeforces Round 376 (Div. 2) {731} PROGRAMMING 47840 1900
10255 Sanatorium binary search constructive algorithms greedy implementation math Statement C Codeforces Round 377 (Div. 2) {732} PROGRAMMING Codeforces Round #377 (Div. 2) Editorial 1300
92374 Buy a Shovel brute force constructive algorithms implementation math Statement A Codeforces Round 377 (Div. 2) {732} PROGRAMMING Codeforces Round #377 (Div. 2) Editorial 800
1461 Anton and School bitmasks constructive algorithms implementation math Statement F Codeforces Round 379 (Div. 2) {734} PROGRAMMING Tutorial of Codeforces Round #379 (Div. 2) 2600
32396 Anton and Digits brute force greedy implementation math Statement B Codeforces Round 379 (Div. 2) {734} PROGRAMMING Tutorial of Codeforces Round #379 (Div. 2) 800
54031 Arpa’s hard exam and Mehrdad’s naive cheat implementation math number theory Statement A Codeforces Round 383 (Div. 2) {742} PROGRAMMING Test data 1000
3889 Tram constructive algorithms implementation math Statement C Codeforces Round 386 (Div. 2) {746} PROGRAMMING Codeforces Round #386 (Div.2) Editorial 1600
1913 Numbers Exchange greedy implementation math Statement E Codeforces Round 386 (Div. 2) {746} PROGRAMMING Codeforces Round #386 (Div.2) Editorial 1800
24161 Compote implementation math Statement A Codeforces Round 386 (Div. 2) {746} PROGRAMMING Codeforces Round #386 (Div.2) Editorial 800
9393 Santa Claus and a Place in a Class implementation math Statement A Technocup 2017 - Elimination Round 3 {748} PROGRAMMING Codeforces Round 389 (Div.2) Editorial 900
58452 Bachgold Problem greedy implementation math number theory Statement A Codeforces Round 388 (Div. 2) {749} PROGRAMMING Tutorial 700
96036 New Year and Hurry binary search brute force implementation math Statement A Good Bye 2016 {750} PROGRAMMING Good Bye 2016 — hints and codes 800
4080 Unfair Poll binary search constructive algorithms implementation math Statement C Codeforces Round 392 (Div. 2) {758} PROGRAMMING Codeforces Round #392 (Div. 2) Editorial 1700
77690 Holiday Of Equality implementation math Statement A Codeforces Round 392 (Div. 2) {758} PROGRAMMING Codeforces Round #392 (Div. 2) Editorial 700
8716 Petr and a calendar implementation math Statement A Codeforces Round 393 (Div. 2) (8VC Venture Cup 2017 - Final Round Div. 2 Edition) {760} PROGRAMMING 8VC Venture Cup 2017 — Final Round and Codeforces Round #393 Editorial 900
15252 Dasha and Stairs brute force constructive algorithms implementation math Statement A Codeforces Round 394 (Div. 2) {761} PROGRAMMING Codeforces Round #394 (Div. 2) [Editorial] 1100
7087 Dasha and friends brute force implementation math Statement B Codeforces Round 394 (Div. 2) {761} PROGRAMMING Codeforces Round #394 (Div. 2) [Editorial] 1300
821 Timofey and remoduling brute force implementation math number theory Statement C Codeforces Round 395 (Div. 1) {763} PROGRAMMING Codeforces Round #395 [Editorial] 2500
17229 Taymyr is calling you brute force implementation math Statement A Codeforces Round 395 (Div. 2) {764} PROGRAMMING Codeforces Round #395 [Editorial] 800
9643 Neverending competitions implementation math Statement A Codeforces Round 397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) {765} PROGRAMMING Codeforces Round #397 Editorial 900
3099 Maximize Sum of Digits *special implementation math Statement B VK Cup 2017 - Qualification 2 {770} PROGRAMMING Tutorial of VK Cup 2017 Qualification Round 2 1700
6326 Molly's Chemicals binary search brute force data structures implementation math Statement C ICM Technex 2017 and Codeforces Round 400 (Div. 1 + Div. 2, combined) {776} PROGRAMMING ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) Editorial 1800
11023 Shell Game constructive algorithms implementation math Statement A Codeforces Round 401 (Div. 2) {777} PROGRAMMING Problem analysis of Codeforces Round #401 (Div. 2) 1100
5828 Not Afraid greedy implementation math Statement B Codeforces Round 406 (Div. 2) {787} PROGRAMMING Codeforces Round #406 Editorial 1300
9961 Anastasia and pebbles implementation math Statement A Codeforces Round 407 (Div. 2) {789} PROGRAMMING Codeforces Round #407(Div.1 + Div.2) Editorial 1100
5091 Masha and geometric depression brute force implementation math Statement B Codeforces Round 407 (Div. 2) {789} PROGRAMMING Codeforces Round #407(Div.1 + Div.2) Editorial 1700
8236 Oleg and shares implementation math Statement A Tinkoff Challenge - Elimination Round {793} PROGRAMMING 51685 1000
1402 Mice problem geometry implementation math sortings Statement C Tinkoff Challenge - Elimination Round {793} PROGRAMMING 51685 2200
20812 k-Factorization implementation math number theory Statement A Educational Codeforces Round 19 {797} PROGRAMMING 51588 1100
10319 Minimum number of steps combinatorics greedy implementation math Statement B Codeforces Round 411 (Div. 1) {804} PROGRAMMING Codeforces Round #411 Editorial 1400
16831 Average Sleep Time data structures implementation math Statement B Educational Codeforces Round 21 {808} PROGRAMMING 52010 1300
4919 Do you want a date? implementation math sortings Statement A Codeforces Round 415 (Div. 1) {809} PROGRAMMING 52099 1500
9414 Straight <<A>> implementation math Statement A Codeforces Round 415 (Div. 2) {810} PROGRAMMING 52099 1000
6983 Treasure Hunt implementation math number theory Statement A Educational Codeforces Round 23 {817} PROGRAMMING 52638 1200
6531 Makes And The Product combinatorics implementation math sortings Statement B Educational Codeforces Round 23 {817} PROGRAMMING 52638 1500
7955 Diplomas and Certificates implementation math Statement A Educational Codeforces Round 24 {818} PROGRAMMING 52991 1000
1805 Mister B and PR Shifts data structures implementation math Statement B Codeforces Round 421 (Div. 1) {819} PROGRAMMING Codeforces Round #421 Editorial 2100
37838 I'm bored with life implementation math number theory Statement A Codeforces Round 422 (Div. 2) {822} PROGRAMMING Codeforces Round #422 (Div. 2) Editorial 800
1394 Bamboo Partition brute force data structures implementation math number theory sortings two pointers Statement C Codeforces Round 424 (Div. 1, rated, based on VK Cup Finals) {830} PROGRAMMING Codeforces Round #424 Editorial 2500
403 Perpetual Motion Machine constructive algorithms dp graphs implementation math trees Statement E Codeforces Round 424 (Div. 1, rated, based on VK Cup Finals) {830} PROGRAMMING Codeforces Round #424 Editorial 3100
512 Strange Radiation binary search implementation math Statement C Codeforces Round 425 (Div. 2) {832} PROGRAMMING Codeforces Round #425 (Div.2) Editorial 2500
2213 Vasya's Function binary search implementation math Statement E Educational Codeforces Round 26 {837} PROGRAMMING 53662 2200
6025 Sorting by Subsequences dfs and similar dsu implementation math sortings Statement A AIM Tech Round 4 (Div. 1) {843} PROGRAMMING AIM Tech Round 4 -- Editorial 1400
10372 Arpa and a research in Mexican wave implementation math Statement A Codeforces Round 432 (Div. 2, based on IndiaHacks Final Round 2017) {851} PROGRAMMING Codeforces Round #432 editorial 800
448 Digits brute force implementation math Statement A Bubble Cup X - Finals [Online Mirror] {852} PROGRAMMING Tutorial 2700