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1 2 3 >Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 26487 | Spreadsheet | implementation math | Statement | B | Codeforces Beta Round 1 {1} | PROGRAMMING | 85 | 1700 | |
| 1946 | Follow Traffic Rules | implementation math | Statement | D | Codeforces Beta Round 5 {5} | PROGRAMMING | C, D и E с CBR5 - разбор | 2100 | |
| 14400 | Hexadecimal's Numbers | brute force implementation math | Statement | C | Codeforces Beta Round 9 (Div. 2 Only) {9} | PROGRAMMING | Codeforces Beta Round #9 tutorial | 1500 | |
| 15600 | Increasing Sequence | constructive algorithms implementation math | Statement | A | Codeforces Beta Round 11 {11} | PROGRAMMING | 1100 | ||
| 9504 | Numbers | implementation math | Statement | A | Codeforces Beta Round 13 {13} | PROGRAMMING | Codeforces Beta Round #13 editorial | 1200 | |
| 3871 | 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 | |
| 1594 | Intersection | implementation math | Statement | B | Codeforces Alpha Round 21 (Codeforces format) {21} | PROGRAMMING | 2300 | ||
| 1454 | Sequence of points | geometry implementation math | Statement | C | Codeforces Beta Round 24 {24} | PROGRAMMING | Codeforces Beta Round #24 solutions | 1800 | |
| 655 | Collisions | brute force implementation math | Statement | E | Codeforces Beta Round 34 (Div. 2) {34} | PROGRAMMING | Codeforces Beta Round #34 (Div. 2) Разбор | 2100 | |
| 4049 | 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 | |
| 4452 | Find Color | constructive algorithms geometry implementation math | Statement | A | Codeforces Beta Round 39 {40} | PROGRAMMING | codeforces #39 | 1300 | |
| 329 | Berland Square | implementation math | Statement | C | Codeforces Beta Round 39 {40} | PROGRAMMING | codeforces #39 | 2200 | |
| 3894 | Flea travel | implementation math | Statement | A | Codeforces Beta Round 51 {55} | PROGRAMMING | Round 51, A | 1300 | |
| 356 | Table | *special greedy implementation math | Statement | C | Unknown Language Round 1 {64} | PROGRAMMING | 1700 | ||
| 2017 | Harry Potter and Three Spells | implementation math | Statement | A | Codeforces Beta Round 60 {65} | PROGRAMMING | Codeforces Beta Round #60: tutorial | 1800 | |
| 203838 | Young Physicist | implementation math | Statement | A | Codeforces Beta Round 63 (Div. 2) {69} | PROGRAMMING | Analysis Codeforces Beta Round #63 (Div. 2) | 1100 | |
| 5340 | Progress Bar | implementation math | Statement | B | Codeforces Beta Round 65 (Div. 2) {71} | PROGRAMMING | Разбор задач Codeforces Beta Round #65 (Div. 2) | 1400 | |
| 2079 | 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 | |
| 1900 | 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 | |
| 32287 | Double Cola | implementation math | Statement | A | Yandex.Algorithm 2011: Qualification 2 {82} | PROGRAMMING | 1889 | 1100 | |
| 17015 | Powerful array | data structures implementation math two pointers | Statement | D | Yandex.Algorithm 2011: Round 2 {86} | PROGRAMMING | Problemset analysis (Yandex, Round 2) | 2700 | |
| 5832 | 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 | |
| 21605 | Chips | implementation math | Statement | A | Codeforces Beta Round 75 (Div. 2 Only) {92} | PROGRAMMING | Analysis Codeforces Beta Round #75 | 800 | |
| 5391 | 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 | |
| 827 | Vectors | implementation math | Statement | C | Codeforces Beta Round 79 (Div. 1 Only) {101} | PROGRAMMING | Codeforces Beta Round 79, editoral | 2100 | |
| 6639 | Testing Pants for Sadness | greedy implementation math | Statement | A | Codeforces Beta Round 80 (Div. 1 Only) {103} | PROGRAMMING | Tutorial | 1200 | |
| 4568 | Petya and Square | implementation math | Statement | B | Codeforces Beta Round 85 (Div. 2 Only) {112} | PROGRAMMING | Разбор CFBR #85 Div. 1 C, D | 1300 | |
| 143 | Sleeping | combinatorics implementation math | Statement | E | Codeforces Beta Round 86 (Div. 1 Only) {113} | PROGRAMMING | Codeforces Beta Round #86 Editorial | 2600 | |
| 2230 | Elevator | implementation math | Statement | A | Codeforces Beta Round 88 {117} | PROGRAMMING | Codeforces Beta Round #88 (Editorial) | 1400 | |
| 1140 | Before Exam | constructive algorithms implementation sortings | Statement | B | Codeforces Beta Round 90 {119} | PROGRAMMING | Разбор задачи E Codeforces Beta Round #90 | 1700 | |
| 5683 | Elevator | brute force implementation math | Statement | A | School Regional Team Contest, Saratov, 2011 {120} | PROGRAMMING | Tutorial for school regional team contest of Saratov | 1000 | |
| 3955 | 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 | |
| 7563 | Opposites Attract | implementation math | Statement | B | Codeforces Beta Round 95 (Div. 2) {131} | PROGRAMMING | Some ideas for Round #95 (Div 2) | 1300 | |
| 5341 | Ternary Logic | implementation math | Statement | B | Codeforces Beta Round 97 (Div. 2) {136} | PROGRAMMING | Codeforces Beta Round #97: editorial | 1200 | |
| 1381 | Last Chance | data structures implementation strings | Statement | E | Codeforces Beta Round 98 (Div. 2) {137} | PROGRAMMING | Codeforces Beta Round #98 (Div. 2): Editorial | 2000 | |
| 1464 | Wallpaper | implementation math | Statement | B | Codeforces Beta Round 99 (Div. 2) {139} | PROGRAMMING | Codeforces Beta Round #99: editorial | 1600 | |
| 6035 | Escape | implementation math | Statement | B | Codeforces Round 105 (Div. 2) {148} | PROGRAMMING | Codeforces Round #105 (Div. 2): editorial | 1500 | |
| 113199 | Insomnia cure | constructive algorithms implementation math | Statement | A | Codeforces Round 105 (Div. 2) {148} | PROGRAMMING | Codeforces Round #105 (Div. 2): editorial | 900 | |
| 95622 | Soft Drinking | implementation math | Statement | A | Codeforces Round 107 (Div. 2) {151} | PROGRAMMING | Codeforces Round #107. Tutorial. | 900 | |
| 3725 | Find Pair | implementation math sortings | Statement | C | Codeforces Round 111 (Div. 2) {160} | PROGRAMMING | Codeforces Round #111 (Div. 2) Разбор Задач | 1700 | |
| 11539 | Wizards and Demonstration | implementation math | Statement | A | Codeforces Round 114 (Div. 2) {168} | PROGRAMMING | Codeforces Round #114 — Tutorial | 1000 | |
| 2531 | Rock-Paper-Scissors | implementation math | Statement | A | Croc Champ 2012 - Round 1 {173} | PROGRAMMING | Croc Champ 2012 — Round 1 — Editorial | 1300 | |
| 2857 | Mathematical Analysis Rocks! | constructive algorithms implementation math | Statement | F | Codeforces Round 116 (Div. 2, ACM-ICPC Rules) {180} | PROGRAMMING | 1300 | ||
| 9287 | 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 | |
| 517 | LCM | *special implementation math | Statement | C | Surprise Language Round 6 {188} | PROGRAMMING | Surprise Language Round #6: editorial | 1400 | |
| 10941 | Exams | implementation math | Statement | A | Codeforces Round 122 (Div. 2) {194} | PROGRAMMING | Editoral Codeforces Round #122 | 1000 | |
| 5520 | After Training | data structures implementation math | Statement | B | Codeforces Round 123 (Div. 2) {195} | PROGRAMMING | Codeforces Round #123 (Div. 2) Разбор Задач | 1300 | |
| 3335 | About Bacteria | implementation math | Statement | A | Codeforces Round 125 (Div. 1) {198} | PROGRAMMING | Solutions for Codeforces Round #125 | 1700 | |
| 367 | 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 | |
| 149827 | Drinks | implementation math | Statement | B | Codeforces Round 126 (Div. 2) {200} | PROGRAMMING | Editorial of Codeforces Round #126 (Div. 2) | 700 | |
| 1516 | Hit Ball | geometry implementation math | Statement | D | Codeforces Round 128 (Div. 2) {203} | PROGRAMMING | 1700 | ||
| 5281 | Tiling with Hexagons | implementation math | Statement | A | Codeforces Round 133 (Div. 2) {216} | PROGRAMMING | Editorial for Codeforces Round #133 | 1300 | |
| 16853 | Little Elephant and Function | implementation math | Statement | A | Codeforces Round 136 (Div. 2) {221} | PROGRAMMING | Codeforces Round #136 — Editorial | 1000 | |
| 2951 | Reducing Fractions | implementation math number theory sortings | Statement | C | Codeforces Round 137 (Div. 2) {222} | PROGRAMMING | Разбор задач Codeforces Round #137 (Div. 2) | 2000 | |
| 1018 | Anniversary | data structures implementation math matrices number theory | Statement | C | Codeforces Round 140 (Div. 1) {226} | PROGRAMMING | Codeforces Round #140 Editorial | 2100 | |
| 96836 | T-primes | binary search implementation math number theory | Statement | B | Codeforces Round 142 (Div. 2) {230} | PROGRAMMING | Codeforces Round #142 Problem Analysis | 1300 | |
| 49427 | Perfect Permutation | implementation math | Statement | A | Codeforces Round 144 (Div. 2) {233} | PROGRAMMING | Editorial for Codeforces Round #144 | 800 | |
| 888 | Number Challenge | combinatorics dp implementation math number theory | Statement | E | Codeforces Round 146 (Div. 1) {235} | PROGRAMMING | Codeforces Round #146 Tutorial | 2600 | |
| 20677 | Two Bags of Potatoes | greedy implementation math | Statement | A | Codeforces Round 148 (Div. 2) {239} | PROGRAMMING | Editorial for Codeforces Round #148 | 1200 | |
| 1384 | Playing with Permutations | implementation math | Statement | B | Codeforces Round 153 (Div. 1) {251} | PROGRAMMING | Editorial of Codeforces Round #153 | 1900 | |
| 2209 | Mr. Bender and Square | binary search implementation math | Statement | D | Codeforces Round 156 (Div. 2) {255} | PROGRAMMING | Codeforces Round #156 tutorial | 1900 | |
| 977 | Furlo and Rublo and Game | games implementation math | Statement | E | Codeforces Round 156 (Div. 2) {255} | PROGRAMMING | Codeforces Round #156 tutorial | 2200 | |
| 16644 | Adding Digits | implementation math | Statement | A | Codeforces Round 158 (Div. 2) {260} | PROGRAMMING | Codeforces Round #158 (Div. 2) Tutorial | 1400 | |
| 35922 | Buttons | implementation math | Statement | B | Codeforces Round 164 (Div. 2) {268} | PROGRAMMING | Codeforces Round #164 (Div. 2) — Разбор задач | 1000 | |
| 51057 | Fancy Fence | geometry implementation math | Statement | A | Codeforces Round 165 (Div. 2) {270} | PROGRAMMING | Разбор Codeforces Round #165 | 1200 | |
| 27804 | Dima and Friends | implementation math | Statement | A | Codeforces Round 167 (Div. 2) {272} | PROGRAMMING | Codeforces Round #167 tutorial | 1000 | |
| 4298 | Dima and Sequence | implementation math | Statement | B | Codeforces Round 167 (Div. 2) {272} | PROGRAMMING | Codeforces Round #167 tutorial | 1400 | |
| 16481 | 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 | |
| 5227 | Game on Tree | implementation math probabilities trees | Statement | C | Codeforces Round 172 (Div. 1) {280} | PROGRAMMING | T | 2400 | |
| 276 | Sequence Transformation | data structures dp implementation math | Statement | E | Codeforces Round 172 (Div. 1) {280} | PROGRAMMING | Codeforces Round #172 Editorial | 3000 | |
| 10228 | XOR and OR | constructive algorithms implementation math | Statement | C | Codeforces Round 173 (Div. 2) {282} | PROGRAMMING | Round #173 — Editorial | 1600 | |
| 7373 | Cows and Primitive Roots | implementation math number theory | Statement | A | Codeforces Round 174 (Div. 2) {284} | PROGRAMMING | Editorial for Codeforces #174 | 1400 | |
| 2459 | Polo the Penguin and XOR operation | implementation math | Statement | C | Codeforces Round 177 (Div. 1) {288} | PROGRAMMING | Codeforces Round #177, editorial | 1900 | |
| 347 | Polo the Penguin and Lucky Numbers | dp implementation math | Statement | E | Codeforces Round 177 (Div. 1) {288} | PROGRAMMING | Codeforces Round #177, editorial | 2800 | |
| 28547 | Shaass and Oskols | implementation math | Statement | A | Codeforces Round 178 (Div. 2) {294} | PROGRAMMING | Codeforces Round #178 Editorial | 900 | |
| 8592 | Lucky Permutation Triple | constructive algorithms implementation math | Statement | A | Codeforces Round 183 (Div. 1) {303} | PROGRAMMING | Codeforces Round #183 Editorial | 1400 | |
| 1427 | Rectangle Puzzle II | implementation math | Statement | B | Codeforces Round 183 (Div. 1) {303} | PROGRAMMING | Codeforces Round #183 Editorial | 1900 | |
| 2290 | Continued Fractions | brute force implementation math | Statement | B | Codeforces Round 184 (Div. 2) {305} | PROGRAMMING | 7712 | 1600 | |
| 5960 | Ilya and Matrix | constructive algorithms greedy implementation sortings | Statement | C | Codeforces Round 186 (Div. 2) {313} | PROGRAMMING | Tutorial | 1400 | |
| 65397 | Ilya and Bank Account | implementation number theory | Statement | A | Codeforces Round 186 (Div. 2) {313} | PROGRAMMING | Tutorial | 900 | |
| 3909 | Ciel and Robot | binary search implementation math | Statement | A | Codeforces Round 190 (Div. 1) {321} | PROGRAMMING | Codeforces Round #190 — Editorial | 1700 | |
| 10704 | Vasily the Bear and Triangle | implementation math | Statement | A | Codeforces Round 195 (Div. 2) {336} | PROGRAMMING | Tutorial Codeforces Round #195 (Div. 2) | 1100 | |
| 277969 | Helpful Maths | greedy implementation sortings strings | Statement | A | Codeforces Round 197 (Div. 2) {339} | PROGRAMMING | Codeforces Round #197 — Tutorial | 900 | |
| 4695 | Tourist Problem | combinatorics implementation math | Statement | C | Codeforces Round 198 (Div. 2) {340} | PROGRAMMING | Tutorial | 1700 | |
| 9882 | Fixed Points | brute force implementation math | Statement | B | Codeforces Round 201 (Div. 2) {347} | PROGRAMMING | Codeforces Round #201 Editorial | 1200 | |
| 3103 | Jeff and Rounding | dp greedy implementation math | Statement | A | Codeforces Round 204 (Div. 1) {351} | PROGRAMMING | Codeforces Round #204 — tutorial | 1900 | |
| 28688 | Jeff and Digits | brute force implementation math | Statement | A | Codeforces Round 204 (Div. 2) {352} | PROGRAMMING | 1100 | ||
| 20035 | Domino | implementation math | Statement | A | Codeforces Round 205 (Div. 2) {353} | PROGRAMMING | 9145 | 1300 | |
| 5271 | Find Maximum | implementation math number theory | Statement | C | Codeforces Round 205 (Div. 2) {353} | PROGRAMMING | 9145 | 1600 | |
| 2440 | Two Heaps | combinatorics constructive algorithms greedy implementation math sortings | Statement | B | Codeforces Round 205 (Div. 2) {353} | PROGRAMMING | 9145 | 1800 | |
| 2092 | Xenia and Hamming | implementation math | Statement | B | Codeforces Round 207 (Div. 1) {356} | PROGRAMMING | 9210 | 2000 | |
| 2026 | 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 | |
| 846 | Dima and Magic Guitar | brute force implementation math | Statement | E | Codeforces Round 214 (Div. 2) {366} | PROGRAMMING | Codeforces Round #214 (Div. 2) — Tutorial | 2300 | |
| 6883 | Valera and Contest | constructive algorithms implementation math | Statement | B | Codeforces Round 216 (Div. 2) {369} | PROGRAMMING | Editorial Codeforces Round #216 (Div. 2) | 1500 | |
| 6672 | K-Periodic Array | greedy implementation math | Statement | A | Codeforces Round 218 (Div. 2) {371} | PROGRAMMING | Codeforces Round #218 (Div. 2): Tutorial | 1200 | |
| 2800 | Making Sequences is Fun | binary search implementation math | Statement | B | Codeforces Round 219 (Div. 2) {373} | PROGRAMMING | Codeforces Round #219 editorial | 1600 | |
| 493 | Red and Black Tree | dp implementation math | Statement | E | Codeforces Round 221 (Div. 1) {375} | PROGRAMMING | Codeforces Round #221 Tutorial | 3000 | |
| 9908 | Lever | implementation math | Statement | A | Codeforces Round 221 (Div. 2) {376} | PROGRAMMING | Codeforces Round #221 Tutorial | 1000 | |
| 10870 | 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 | |
| 10626 | 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 | |
| 2604 | Fox and Minimal path | bitmasks constructive algorithms graphs implementation math | Statement | B | Codeforces Round 228 (Div. 1) {388} | PROGRAMMING | Codeforces Round #228 — Editorial | 2000 | |
| 299 | Physical Education and Buns | brute force implementation math | Statement | D | Codeforces Round 231 (Div. 2) {394} | PROGRAMMING | 2000.0 | ||
| 835 | On Corruption and Numbers | constructive algorithms implementation math | Statement | B | Codeforces Round 232 (Div. 2) {397} | PROGRAMMING | 1000.0 | Codeforces Round #232 Editorial (restored) | |
| 3013 | Inna and Huge Candy Matrix | implementation math | Statement | C | Codeforces Round 234 (Div. 2) {400} | PROGRAMMING | Codeforces Round #234 (Div. 2) — Tutorial | 1500 | |
| 4605 | Sereja and Contests | greedy implementation math | Statement | B | Codeforces Round 235 (Div. 2) {401} | PROGRAMMING | Codeforces Round #235 (Div. 2) — Tutorial | 1200 | |
| 17455 | Vanya and Cards | implementation math | Statement | A | Codeforces Round 235 (Div. 2) {401} | PROGRAMMING | Codeforces Round #235 (Div. 2) — Tutorial | 900 | |
| 3053 | Marathon | implementation math | Statement | B | Codeforces Round 237 (Div. 2) {404} | PROGRAMMING | Codeforces Round #237 (Div. 2) Editorial | 1500 | |
| 4941 | Unusual Product | implementation math | Statement | C | Codeforces Round 238 (Div. 2) {405} | PROGRAMMING | Codeforces Round #238 Tutorial | 1600 | |
| 3290 | Toy Sum | greedy implementation math | Statement | D | Codeforces Round 238 (Div. 2) {405} | PROGRAMMING | Codeforces Round #238 Tutorial | 1900 | |
| 273 | Hamming Triples | implementation math two pointers | Statement | E | Codeforces Round 238 (Div. 1) {406} | PROGRAMMING | Codeforces Round #238 Tutorial | 2700 | |
| 5177 | Triangle | brute force geometry implementation math | Statement | A | Codeforces Round 239 (Div. 1) {407} | PROGRAMMING | Codeforces Round #239 Editorial | 1700 | |
| 1193 | Curious Array | brute force combinatorics implementation math | Statement | C | Codeforces Round 239 (Div. 1) {407} | PROGRAMMING | Codeforces Round #239 Editorial | 2500 | |
| 6705 | Mashmokh and Tokens | binary search greedy implementation math | Statement | B | Codeforces Round 240 (Div. 2) {415} | PROGRAMMING | Codeforces Round #240 Editorial | 1500 | |
| 1094 | Population Size | greedy implementation math | Statement | D | Codeforces Round 241 (Div. 2) {416} | PROGRAMMING | Codeforces Round #241 — editorial | 2300 | |
| 3417 | Elimination | dp implementation math | Statement | A | RCC 2014 Warmup (Div. 2) {417} | PROGRAMMING | RCC 2014 WarmUp Analysis | 1500 | |
| 1618 | Police Patrol | greedy implementation math ternary search | Statement | E | Codeforces Round 244 (Div. 2) {427} | PROGRAMMING | Codeforces Round #244 (Div. 2) Editorial | 2000 | |
| 2622 | Ryouko's Memory Note | implementation math sortings | Statement | C | Codeforces Round 248 (Div. 2) {433} | PROGRAMMING | Codeforces Round #248 Editorial | 1900 | |
| 3148 | Om Nom and Spiders | implementation math | Statement | B | Zepto Code Rush 2014 {436} | PROGRAMMING | Zepto Code Rush 2014 — solutions A-D | 1400 | |
| 1202 | 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 | |
| 28916 | Jzzhu and Sequences | implementation math | Statement | B | Codeforces Round 257 (Div. 2) {450} | PROGRAMMING | Codeforces Round #257 Editorial | 1400 | |
| 3590 | Predict Outcome of the Game | brute force implementation math | Statement | C | Codeforces Round 258 (Div. 2) {451} | PROGRAMMING | Codeforces Round #258 Editorial | 1700 | |
| 52220 | Vasya and Socks | brute force implementation math | Statement | A | Codeforces Round 262 (Div. 2) {460} | PROGRAMMING | 13465 | 1000 | |
| 13469 | Little Dima and Equation | brute force implementation math number theory | Statement | B | Codeforces Round 262 (Div. 2) {460} | PROGRAMMING | 13465 | 1500 | |
| 30063 | Caisa and Pylons | brute force implementation math | Statement | B | Codeforces Round 264 (Div. 2) {463} | PROGRAMMING | CF 264 Div 2 Tutorial | 1200 | |
| 51938 | Dreamoon and Stairs | implementation math | Statement | A | Codeforces Round 272 (Div. 2) {476} | PROGRAMMING | Editorial | 1100 | |
| 24932 | Counterexample | brute force implementation math number theory | Statement | A | Codeforces Round 275 (Div. 2) {483} | PROGRAMMING | Codeforces Round #275 Editorial | 1100 | |
| 629 | Strange Sorting | implementation math | Statement | C | Codeforces Round 276 (Div. 1) {484} | PROGRAMMING | Codeforces Round #276 — Editorial | 2600 | |
| 8788 | Factory | implementation math matrices | Statement | A | Codeforces Round 276 (Div. 2) {485} | PROGRAMMING | Codeforces Round #276 — Editorial | 1400 | |
| 155601 | Calculating Function | implementation math | Statement | A | Codeforces Round 277 (Div. 2) {486} | PROGRAMMING | Codeforces Round #277(Div. 2) Editorial | 1100 | |
| 71855 | Team Olympiad | greedy implementation sortings | Statement | A | Codeforces Round 279 (Div. 2) {490} | PROGRAMMING | Codeforces Round #279 (Div. 2) Editorial | 900 | |
| 90997 | Vanya and Lanterns | binary search implementation math sortings | Statement | B | Codeforces Round 280 (Div. 2) {492} | PROGRAMMING | Разбор задач | 1200 | |
| 3326 | Vanya and Computer Game | binary search implementation math sortings | Statement | D | Codeforces Round 280 (Div. 2) {492} | PROGRAMMING | Разбор задач | 1800 | |
| 17199 | Minimum Difficulty | brute force implementation math | Statement | A | Codeforces Round 283 (Div. 2) {496} | PROGRAMMING | Codeforces Round #283: editorial (with bonuses!) | 1000 | |
| 6042 | New Year Book Reading | constructive algorithms greedy implementation math | Statement | C | Good Bye 2014 {500} | PROGRAMMING | Tutorial 2 | 1600 | |
| 4568 | Guess Your Way Out! | implementation math trees | Statement | C | Codeforces Round 287 (Div. 2) {507} | PROGRAMMING | Editorial | 1700 | |
| 22701 | 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 | |
| 1063 | Arthur and Questions | greedy implementation math ternary search | Statement | E | Codeforces Round 293 (Div. 2) {518} | PROGRAMMING | 2400 | ||
| 20738 | A and B and Team Training | greedy implementation math number theory | Statement | C | Codeforces Round 294 (Div. 2) {519} | PROGRAMMING | Editorial | 1300 | |
| 62853 | 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 | |
| 15624 | Playing with Paper | implementation math | Statement | A | Codeforces Round 296 (Div. 2) {527} | PROGRAMMING | Codeforces Round #296 Editorial | 1100 | |
| 2443 | 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 | |
| 12945 | Exam | constructive algorithms implementation math | Statement | A | Codeforces Round 298 (Div. 2) {534} | PROGRAMMING | 1100 | ||
| 6147 | Tourist's Notes | binary search brute force greedy implementation math | Statement | C | Codeforces Round 300 {538} | PROGRAMMING | Codeforces Round #300 Editorial (+challenges) | 1600 | |
| 237358 | Soldier and Bananas | brute force implementation math | Statement | A | Codeforces Round 304 (Div. 2) {546} | PROGRAMMING | Codeforces Round #304 (Div.2) editorial | 800 | |
| 2753 | Mike and Frog | brute force greedy implementation math | Statement | A | Codeforces Round 305 (Div. 1) {547} | PROGRAMMING | Codeforces Round #305 Editorial | 1900 | |
| 1500 | Brackets in Implications | constructive algorithms greedy implementation math | Statement | E | Codeforces Round 306 (Div. 2) {550} | PROGRAMMING | Codeforces Round #306 (Div. 2) Editorial | 2300 | |
| 2114 | GukiZ and Binary Operations | combinatorics implementation math matrices number theory | Statement | D | Codeforces Round 307 (Div. 2) {551} | PROGRAMMING | Tutorial | 2400 | |
| 10167 | Vanya and Table | implementation math | Statement | A | Codeforces Round 308 (Div. 2) {552} | PROGRAMMING | Codeforces #308 (Div. 2) Editorial | 1100 | |
| 16089 | Vanya and Books | implementation math | Statement | B | Codeforces Round 308 (Div. 2) {552} | PROGRAMMING | Codeforces #308 (Div. 2) Editorial | 1300 | |
| 1740 | 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 | |
| 2272 | 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 | |
| 932 | Case of a Top Secret | binary search implementation math | Statement | D | Codeforces Round 310 (Div. 1) {555} | PROGRAMMING | Codeforces Round #310 Editorial | 2500 | |
| 8520 | Ilya and Diplomas | greedy implementation math | Statement | A | Codeforces Round 311 (Div. 2) {557} | PROGRAMMING | Codeforces Round #311 (Div.2) Editorial | 1200 | |
| 7491 | Pasha and Tea | constructive algorithms implementation math sortings | Statement | B | Codeforces Round 311 (Div. 2) {557} | PROGRAMMING | Codeforces Round #311 (Div.2) Editorial | 1500 | |
| 5409 | Primes or Palindromes? | brute force implementation math number theory | Statement | A | Codeforces Round 315 (Div. 1) {568} | PROGRAMMING | Codeforces Round #315 Editorial | 1700 | |
| 5068 | Music | implementation math | Statement | A | Codeforces Round 315 (Div. 2) {569} | PROGRAMMING | Codeforces Round #315 Editorial | 1500 | |
| 16906 | Simple Game | constructive algorithms games greedy implementation math | Statement | B | Codeforces Round 316 (Div. 2) {570} | PROGRAMMING | Codeforces Round #316 Editorial | 1300 | |
| 2702 | 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 | |
| 18504 | 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 | |
| 13662 | Luxurious Houses | implementation math | Statement | B | Codeforces Round 322 (Div. 2) {581} | PROGRAMMING | Codeforces Round #322 (Div.2) Editorial | 1200 | |
| 7604 | Developing Skills | implementation math sortings | Statement | C | Codeforces Round 322 (Div. 2) {581} | PROGRAMMING | Codeforces Round #322 (Div.2) Editorial | 1400 | |
| 4762 | 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 | |
| 85464 | Vasya the Hipster | implementation math | Statement | A | Codeforces Round 322 (Div. 2) {581} | PROGRAMMING | Codeforces Round #322 (Div.2) Editorial | 700 | |
| 17336 | Wizards' Duel | implementation math | Statement | A | Codeforces Round 327 (Div. 2) {591} | PROGRAMMING | 900 | ||
| 9946 | Saitama Destroys Hotel | implementation math | Statement | A | Codeforces Round 336 (Div. 2) {608} | PROGRAMMING | Codeforces Round #336 Editorial | 1100 | |
| 7422 | Load Balancing | implementation math | Statement | C | Educational Codeforces Round 3 {609} | PROGRAMMING | Editorial | 1500 | |
| 7618 | HDD is Outdated Technology | implementation math | Statement | B | Educational Codeforces Round 4 {612} | PROGRAMMING | 22299 | 1200 | |
| 7304 | Gena's Code | implementation math | Statement | B | Codeforces Round 339 (Div. 2) {614} | PROGRAMMING | Tutorial | 1400 | |
| 1065 | Hexagons | binary search implementation math | Statement | E | Codeforces Round 338 (Div. 2) {615} | PROGRAMMING | Codeforces Round #338 (Div. 2) editorial | 2200 | |
| 3527 | Sum of Remainders | implementation math number theory | Statement | E | Educational Codeforces Round 5 {616} | PROGRAMMING | Editorial of Educational Codeforces Round 5 | 2200 | |
| 14389 | Professor GukiZ's Robot | implementation math | Statement | A | Educational Codeforces Round 6 {620} | PROGRAMMING | Editorial of Educational Codeforces Round 6 | 1000 | |
| 10281 | Infinite Sequence | implementation math | Statement | A | Educational Codeforces Round 7 {622} | PROGRAMMING | Editorial of Educational Codeforces Round 7 | 1100 | |
| 5671 | Guest From the Past | implementation math | Statement | A | Codeforces Round 342 (Div. 2) {625} | PROGRAMMING | Codeforces Round #342 (Div. 2) : editorial | 1700 | |
| 679 | Finals in arithmetic | constructive algorithms implementation math | Statement | D | Codeforces Round 342 (Div. 2) {625} | PROGRAMMING | Codeforces Round #342 (Div. 2) : editorial | 2400 | |
| 4086 | Cracking the Code | implementation math | Statement | L | Experimental Educational Round: VolBIT Formulas Blitz {630} | PROGRAMMING | Разбор задач Experimental Educational Round: VolBIT Formulas Blitz | 1700 | |
| 3055 | Fibonacci-ish | brute force dp hashing implementation math | Statement | D | Manthan, Codefest 16 {633} | PROGRAMMING | Manthan, Codefest 16: Editorials | 2000 | |
| 1255 | Bear and Polynomials | hashing implementation math | Statement | C | VK Cup 2016 - Round 1 {639} | PROGRAMMING | Tutorial | 2200 | |
| 1575 | 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 | |
| 24167 | Joysticks | dp greedy implementation math | Statement | A | Codeforces Round 345 (Div. 2) {651} | PROGRAMMING | 1100 | ||
| 5273 | Gabriel and Caterpillar | implementation math | Statement | A | Educational Codeforces Round 10 {652} | PROGRAMMING | Editorial of Educational Codeforces Round 10 | 1400 | |
| 16875 | Round House | implementation math | Statement | A | Codeforces Round 346 (Div. 2) {659} | PROGRAMMING | Editorial for Codeforces Round #346 (Div. 2) | 1100 | |
| 6722 | Bicycle Race | geometry implementation math | Statement | D | Codeforces Round 346 (Div. 2) {659} | PROGRAMMING | Editorial for Codeforces Round #346 (Div. 2) | 1500 | |
| 10486 | Co-prime Array | greedy implementation math number theory | Statement | A | Educational Codeforces Round 11 {660} | PROGRAMMING | Editorial of Educational Codeforces Round 11 | 1300 | |
| 1716 | 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 | |
| 5839 | Pyramid of Glasses | implementation math math | Statement | B | Codeforces Round 354 (Div. 2) {676} | PROGRAMMING | Editorial | 1500 | |
| 7930 | Vanya and Food Processor | implementation math | Statement | B | Codeforces Round 355 (Div. 2) {677} | PROGRAMMING | Codeforces Round #355 (Div. 2) Editorial | 1400 | |
| 15231 | Johny Likes Numbers | implementation math | Statement | A | Educational Codeforces Round 13 {678} | PROGRAMMING | Editorial | 1000 | |
| 11099 | Joty and Chocolate | implementation math number theory | Statement | C | Educational Codeforces Round 13 {678} | PROGRAMMING | Editorial | 1600 | |
| 343 | 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 | |
| 2218 | PLEASE | combinatorics dp implementation math matrices | Statement | C | Codeforces Round 362 (Div. 1) {696} | PROGRAMMING | Codeforces Round #362 (Editorial) | 2200 | |
| 13380 | Pineapple Incident | implementation math | Statement | A | Codeforces Round 362 (Div. 2) {697} | PROGRAMMING | 1000 | ||
| 5993 | Barnicle | brute force implementation math strings | Statement | B | Codeforces Round 362 (Div. 2) {697} | PROGRAMMING | 1400 | ||
| 13802 | Powers of Two | brute force data structures implementation math | Statement | B | Educational Codeforces Round 15 {702} | PROGRAMMING | 46324 | 1500 | |
| 6069 | Mishka and trip | implementation math | Statement | B | Codeforces Round 365 (Div. 2) {703} | PROGRAMMING | Codeforces Round #365 (Div. 2) Editorial | 1400 | |
| 525 | Black Widow | dp graphs implementation math | Statement | C | Codeforces Round 366 (Div. 1) {704} | PROGRAMMING | Tutorial | 2800 | |
| 3456 | Recover the String | constructive algorithms greedy implementation math | Statement | B | AIM Tech Round 3 (Div. 1) {708} | PROGRAMMING | Editorial | 1900 | |
| 12597 | Memory and Crow | implementation math | Statement | A | Codeforces Round 370 (Div. 2) {712} | PROGRAMMING | Codeforces Round #370 Editorial | 900 | |
| 11156 | Meeting of Old Friends | implementation math | Statement | A | Codeforces Round 371 (Div. 2) {714} | PROGRAMMING | Codeforces Round #371 Editorial | 1100 | |
| 4633 | Efim and Strange Grade | dp implementation math | Statement | A | Codeforces Round 373 (Div. 1) {718} | PROGRAMMING | Codeforces Round #373 — Editorial | 1700 | |
| 12479 | Passwords | implementation math sortings strings | Statement | B | Codeforces Round 374 (Div. 2) {721} | PROGRAMMING | Codeforces Round #374 (Div. 2) Editorial | 1200 | |
| 101714 | The New Year: Meeting Friends | implementation math sortings | Statement | A | Codeforces Round 375 (Div. 2) {723} | PROGRAMMING | Codeforces Round #375 (Div.2) Editorial | 800 | |
| 4251 | Batch Sort | brute force greedy implementation math | Statement | B | Intel Code Challenge Final Round (Div. 1 + Div. 2, Combined) {724} | PROGRAMMING | Tutorial | 1500 | |
| 2284 | 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 | |
| 5328 | Food on the Plane | implementation math | Statement | B | Canada Cup 2016 {725} | PROGRAMMING | 1200 | ||
| 915 | 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 | |
| 3156 | Video Cards | brute force data structures implementation math number theory | Statement | F | Codeforces Round 376 (Div. 2) {731} | PROGRAMMING | 47840 | 1900 | |
| 10194 | Sanatorium | binary search constructive algorithms greedy implementation math | Statement | C | Codeforces Round 377 (Div. 2) {732} | PROGRAMMING | Codeforces Round #377 (Div. 2) Editorial | 1300 | |
| 89524 | 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 | |
| 1404 | 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 | |
| 32053 | 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 | |
| 52357 | 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 | |
| 3865 | Tram | constructive algorithms implementation math | Statement | C | Codeforces Round 386 (Div. 2) {746} | PROGRAMMING | Codeforces Round #386 (Div.2) Editorial | 1600 | |
| 1906 | Numbers Exchange | greedy implementation math | Statement | E | Codeforces Round 386 (Div. 2) {746} | PROGRAMMING | Codeforces Round #386 (Div.2) Editorial | 1800 | |
| 23914 | Compote | implementation math | Statement | A | Codeforces Round 386 (Div. 2) {746} | PROGRAMMING | Codeforces Round #386 (Div.2) Editorial | 800 | |
| 9362 | 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 | |
| 57426 | Bachgold Problem | greedy implementation math number theory | Statement | A | Codeforces Round 388 (Div. 2) {749} | PROGRAMMING | Tutorial | 700 | |
| 93342 | New Year and Hurry | binary search brute force implementation math | Statement | A | Good Bye 2016 {750} | PROGRAMMING | Good Bye 2016 — hints and codes | 800 | |
| 4065 | Unfair Poll | binary search constructive algorithms implementation math | Statement | C | Codeforces Round 392 (Div. 2) {758} | PROGRAMMING | Codeforces Round #392 (Div. 2) Editorial | 1700 | |
| 75764 | Holiday Of Equality | implementation math | Statement | A | Codeforces Round 392 (Div. 2) {758} | PROGRAMMING | Codeforces Round #392 (Div. 2) Editorial | 700 | |
| 8657 | 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 | |
| 15157 | 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 | |
| 7058 | Dasha and friends | brute force implementation math | Statement | B | Codeforces Round 394 (Div. 2) {761} | PROGRAMMING | Codeforces Round #394 (Div. 2) [Editorial] | 1300 | |
| 783 | Timofey and remoduling | brute force implementation math number theory | Statement | C | Codeforces Round 395 (Div. 1) {763} | PROGRAMMING | Codeforces Round #395 [Editorial] | 2500 | |
| 17151 | Taymyr is calling you | brute force implementation math | Statement | A | Codeforces Round 395 (Div. 2) {764} | PROGRAMMING | Codeforces Round #395 [Editorial] | 800 | |
| 9582 | 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 | |
| 3072 | 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 | |
| 6265 | 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 | |
| 10916 | Shell Game | constructive algorithms implementation math | Statement | A | Codeforces Round 401 (Div. 2) {777} | PROGRAMMING | Problem analysis of Codeforces Round #401 (Div. 2) | 1100 | |
| 5774 | Not Afraid | greedy implementation math | Statement | B | Codeforces Round 406 (Div. 2) {787} | PROGRAMMING | Codeforces Round #406 Editorial | 1300 | |
| 9833 | Anastasia and pebbles | implementation math | Statement | A | Codeforces Round 407 (Div. 2) {789} | PROGRAMMING | Codeforces Round #407(Div.1 + Div.2) Editorial | 1100 | |
| 4958 | 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 | |
| 8046 | Oleg and shares | implementation math | Statement | A | Tinkoff Challenge - Elimination Round {793} | PROGRAMMING | 51685 | 1000 | |
| 1364 | Mice problem | geometry implementation math sortings | Statement | C | Tinkoff Challenge - Elimination Round {793} | PROGRAMMING | 51685 | 2200 | |
| 20126 | k-Factorization | implementation math number theory | Statement | A | Educational Codeforces Round 19 {797} | PROGRAMMING | 51588 | 1100 | |
| 10176 | Minimum number of steps | combinatorics greedy implementation math | Statement | B | Codeforces Round 411 (Div. 1) {804} | PROGRAMMING | Codeforces Round #411 Editorial | 1400 | |
| 15278 | Average Sleep Time | data structures implementation math | Statement | B | Educational Codeforces Round 21 {808} | PROGRAMMING | 52010 | 1300 | |
| 4898 | Do you want a date? | implementation math sortings | Statement | A | Codeforces Round 415 (Div. 1) {809} | PROGRAMMING | 52099 | 1500 | |
| 9330 | Straight <<A>> | implementation math | Statement | A | Codeforces Round 415 (Div. 2) {810} | PROGRAMMING | 52099 | 1000 | |
| 6901 | Treasure Hunt | implementation math number theory | Statement | A | Educational Codeforces Round 23 {817} | PROGRAMMING | 52638 | 1200 | |
| 6438 | Makes And The Product | combinatorics implementation math sortings | Statement | B | Educational Codeforces Round 23 {817} | PROGRAMMING | 52638 | 1500 | |
| 7812 | Diplomas and Certificates | implementation math | Statement | A | Educational Codeforces Round 24 {818} | PROGRAMMING | 52991 | 1000 | |
| 1795 | Mister B and PR Shifts | data structures implementation math | Statement | B | Codeforces Round 421 (Div. 1) {819} | PROGRAMMING | Codeforces Round #421 Editorial | 2100 | |
| 37138 | 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 | |
| 1316 | 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 | |
| 338 | 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 | |
| 484 | Strange Radiation | binary search implementation math | Statement | C | Codeforces Round 425 (Div. 2) {832} | PROGRAMMING | Codeforces Round #425 (Div.2) Editorial | 2500 | |
| 2078 | Vasya's Function | binary search implementation math | Statement | E | Educational Codeforces Round 26 {837} | PROGRAMMING | 53662 | 2200 | |
| 5984 | 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 | |
| 10325 | 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 | |
| 429 | Digits | brute force implementation math | Statement | A | Bubble Cup X - Finals [Online Mirror] {852} | PROGRAMMING | Tutorial | 2700 |