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< 1 2 3 4 ... 12 13 14 >Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 1427 | Below the Diagonal | constructive algorithms greedy math | Statement | C | Codeforces Round 163 (Div. 2) {266} | PROGRAMMING | Codeforces Round #163 (Div. 2) Tutorial | 2000 | |
| 1054 | More Queries to Array... | data structures math | Statement | E | Codeforces Round 163 (Div. 2) {266} | PROGRAMMING | Codeforces Round #163 (Div. 2) Tutorial | 2600 | |
| 983 | BerDonalds | graphs math shortest paths | Statement | D | Codeforces Round 163 (Div. 2) {266} | PROGRAMMING | Codeforces Round #163 (Div. 2) Tutorial | 2600 | |
| 9495 | Subtractions | math number theory | Statement | A | Codeforces Testing Round 5 {267} | PROGRAMMING | 1100 | ||
| 251 | Berland Traffic | math matrices | Statement | C | Codeforces Testing Round 5 {267} | PROGRAMMING | 2300 | ||
| 35722 | Buttons | implementation math | Statement | B | Codeforces Round 164 (Div. 2) {268} | PROGRAMMING | Codeforces Round #164 (Div. 2) — Разбор задач | 1000 | |
| 14626 | Beautiful Sets of Points | constructive algorithms implementation | Statement | C | Codeforces Round 164 (Div. 2) {268} | PROGRAMMING | Codeforces Round #164 (Div. 2) — Разбор задач | 1500 | |
| 1135 | Playlist | math probabilities sortings | Statement | E | Codeforces Round 164 (Div. 2) {268} | PROGRAMMING | Codeforces Round #164 (Div. 2) — Problems Analysis | 2100 | |
| 3692 | Magical Boxes | greedy math | Statement | A | Codeforces Round 165 (Div. 1) {269} | PROGRAMMING | Tutorial | 1700 | |
| 50690 | Fancy Fence | geometry implementation math | Statement | A | Codeforces Round 165 (Div. 2) {270} | PROGRAMMING | Разбор Codeforces Round #165 | 1200 | |
| 15353 | Prime Matrix | binary search brute force math number theory | Statement | B | Codeforces Round 166 (Div. 2) {271} | PROGRAMMING | editroal | 1400 | |
| 597 | Three Horses | constructive algorithms math number theory | Statement | E | Codeforces Round 166 (Div. 2) {271} | PROGRAMMING | 6662 | 2500 | |
| 27584 | Dima and Friends | implementation math | Statement | A | Codeforces Round 167 (Div. 2) {272} | PROGRAMMING | Codeforces Round #167 tutorial | 1000 | |
| 4283 | Dima and Sequence | implementation math | Statement | B | Codeforces Round 167 (Div. 2) {272} | PROGRAMMING | Codeforces Round #167 tutorial | 1400 | |
| 2828 | Dima and Two Sequences | combinatorics math sortings | Statement | D | Codeforces Round 167 (Div. 2) {272} | PROGRAMMING | Codeforces Round #167 tutorial | 1800 | |
| 16293 | 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 | |
| 1590 | Beautiful Decomposition | dp games greedy number theory | Statement | E | Codeforces Round 171 (Div. 2) {279} | PROGRAMMING | Codeforces Round #171 (Div. 2) Разбор Задач | 2100 | |
| 5081 | Game on Tree | implementation math probabilities trees | Statement | C | Codeforces Round 172 (Div. 1) {280} | PROGRAMMING | T | 2400 | |
| 258 | Sequence Transformation | data structures dp implementation math | Statement | E | Codeforces Round 172 (Div. 1) {280} | PROGRAMMING | Codeforces Round #172 Editorial | 3000 | |
| 13959 | Painting Eggs | greedy math | Statement | B | Codeforces Round 173 (Div. 2) {282} | PROGRAMMING | Round #173 — Editorial | 1500 | |
| 10164 | XOR and OR | constructive algorithms implementation math | Statement | C | Codeforces Round 173 (Div. 2) {282} | PROGRAMMING | Round #173 — Editorial | 1600 | |
| 640 | Cows and Cool Sequences | dp math number theory | Statement | D | Codeforces Round 174 (Div. 1) {283} | PROGRAMMING | Editorial for Codeforces #174 | 2400 | |
| 853 | Cow Tennis Tournament | combinatorics data structures math | Statement | E | Codeforces Round 174 (Div. 1) {283} | PROGRAMMING | Math Problems on Codeforces #174 | 2700 | |
| 7324 | Cows and Primitive Roots | implementation math number theory | Statement | A | Codeforces Round 174 (Div. 2) {284} | PROGRAMMING | Editorial for Codeforces #174 | 1400 | |
| 1290 | Positions in Permutations | combinatorics dp math | Statement | E | Codeforces Round 175 (Div. 2) {285} | PROGRAMMING | Codeforces Round #175 (Div. 2) Tutorial | 2600 | |
| 3445 | Lucky Permutation | constructive algorithms math | Statement | A | Codeforces Round 176 (Div. 1) {286} | PROGRAMMING | Tutorial | 1600 | |
| 1018 | Ladies' Shop | constructive algorithms fft math | Statement | E | Codeforces Round 176 (Div. 1) {286} | PROGRAMMING | Tutorial | 2600 | |
| 11493 | Pipeline | binary search math | Statement | B | Codeforces Round 176 (Div. 2) {287} | PROGRAMMING | Разбор задач | 1700 | |
| 2452 | Polo the Penguin and XOR operation | implementation math | Statement | C | Codeforces Round 177 (Div. 1) {288} | PROGRAMMING | Codeforces Round #177, editorial | 1900 | |
| 346 | Polo the Penguin and Lucky Numbers | dp implementation math | Statement | E | Codeforces Round 177 (Div. 1) {288} | PROGRAMMING | Codeforces Round #177, editorial | 2800 | |
| 632 | Cube Problem | brute force math number theory | Statement | C | Croc Champ 2013 - Round 2 {293} | PROGRAMMING | Croc Champ 2013 — Round 2 — Editorial | 2300 | |
| 261 | Ksusha and Square | geometry math probabilities two pointers | Statement | D | Croc Champ 2013 - Round 2 {293} | PROGRAMMING | Croc Champ 2013 — Round 2 — Editorial | 2700 | |
| 28258 | Shaass and Oskols | implementation math | Statement | A | Codeforces Round 178 (Div. 2) {294} | PROGRAMMING | Codeforces Round #178 Editorial | 900 | |
| 25954 | Yaroslav and Permutations | greedy math | Statement | A | Codeforces Round 179 (Div. 2) {296} | PROGRAMMING | Codeforces Round #179 tutorial | 1100 | |
| 1102 | Empire Strikes Back | binary search math number theory | Statement | E | Codeforces Round 181 (Div. 2) {300} | PROGRAMMING | English Tutorial | 2400 | |
| 8555 | Lucky Permutation Triple | constructive algorithms implementation math | Statement | A | Codeforces Round 183 (Div. 1) {303} | PROGRAMMING | Codeforces Round #183 Editorial | 1400 | |
| 1420 | Rectangle Puzzle II | implementation math | Statement | B | Codeforces Round 183 (Div. 1) {303} | PROGRAMMING | Codeforces Round #183 Editorial | 1900 | |
| 350 | Rotatable Number | math number theory | Statement | D | Codeforces Round 183 (Div. 1) {303} | PROGRAMMING | Codeforces Round #183 Editorial | 2500 | |
| 965 | Minimum Modular | brute force graphs math number theory | Statement | C | Codeforces Round 183 (Div. 1) {303} | PROGRAMMING | Codeforces Round #183 Editorial | 2700 | |
| 383 | Random Ranking | dp math probabilities | Statement | E | Codeforces Round 183 (Div. 1) {303} | PROGRAMMING | Codeforces Round #183 Editorial | 2800 | |
| 12016 | Pythagorean Theorem II | brute force math | Statement | A | Codeforces Round 183 (Div. 2) {304} | PROGRAMMING | Codeforces Round #183 Editorial | 1300 | |
| 2281 | Continued Fractions | brute force implementation math | Statement | B | Codeforces Round 184 (Div. 2) {305} | PROGRAMMING | 7712 | 1600 | |
| 555 | Olya and Graph | combinatorics math | Statement | D | Codeforces Round 184 (Div. 2) {305} | PROGRAMMING | 7712 | 2600 | |
| 529 | Morning run | binary search math two pointers | Statement | A | Croc Champ 2013 - Finals (online version, Div. 1) {309} | PROGRAMMING | Чемпионат КРОК 2013 — Финальный раунд — Разбор | 2000 | |
| 782 | Interval Cubing | data structures math | Statement | D | Codeforces Round 185 (Div. 1) {311} | PROGRAMMING | Codeforces Round #185 Editorial (Div.2 B&Div.1 E) | 2500 | |
| 13324 | Archer | math probabilities | Statement | B | Codeforces Round 185 (Div. 2) {312} | PROGRAMMING | Codeforces Round #185 Editorial | 1300 | |
| 5933 | Ilya and Matrix | constructive algorithms greedy implementation sortings | Statement | C | Codeforces Round 186 (Div. 2) {313} | PROGRAMMING | Tutorial | 1400 | |
| 64806 | Ilya and Bank Account | implementation number theory | Statement | A | Codeforces Round 186 (Div. 2) {313} | PROGRAMMING | Tutorial | 900 | |
| 2291 | Special Task | math | Statement | A2 | ABBYY Cup 3.0 {316} | PROGRAMMING | ABBYY Cup 3.0. Solutions | 1400 | |
| 432 | Summer Homework | data structures math | Statement | E2 | ABBYY Cup 3.0 {316} | PROGRAMMING | ABBYY Cup 3.0. Solutions | 2400 | |
| 707 | PE Lesson | dp math | Statement | D3 | ABBYY Cup 3.0 {316} | PROGRAMMING | ABBYY Cup 3.0. Solutions | 2400 | |
| 570 | Summer Homework | data structures math | Statement | E3 | ABBYY Cup 3.0 {316} | PROGRAMMING | ABBYY Cup 3.0. Solutions | 2500 | |
| 142183 | Even Odds | math | Statement | A | Codeforces Round 188 (Div. 2) {318} | PROGRAMMING | 7956 | 1000 | |
| 3019 | Malek Dance Club | combinatorics math | Statement | A | Codeforces Round 189 (Div. 1) {319} | PROGRAMMING | Codeforces Round #189 — Editorial | 1700 | |
| 3893 | Ciel and Robot | binary search implementation math | Statement | A | Codeforces Round 190 (Div. 1) {321} | PROGRAMMING | Codeforces Round #190 — Editorial | 1700 | |
| 594 | Ciel and Flipboard | dp greedy math | Statement | D | Codeforces Round 190 (Div. 1) {321} | PROGRAMMING | Codeforces Round #190 — Editorial | 2900 | |
| 13152 | Ciel and Flowers | combinatorics math | Statement | B | Codeforces Round 190 (Div. 2) {322} | PROGRAMMING | Codeforces Round #190 — Editorial | 1600 | |
| 1672 | Stadium and Games | binary search math | Statement | B | MemSQL start[c]up Round 1 {325} | PROGRAMMING | Editorial | 1800 | |
| 21600 | Hungry Sequence | math | Statement | B | Codeforces Round 191 (Div. 2) {327} | PROGRAMMING | Codeforces Round #191 — Tutorial | 1300 | |
| 3659 | Magic Five | combinatorics math | Statement | C | Codeforces Round 191 (Div. 2) {327} | PROGRAMMING | Codeforces Round #191 — Tutorial | 1700 | |
| 182 | Evil | math | Statement | E | Codeforces Round 192 (Div. 1) {329} | PROGRAMMING | Codeforces Round #192 Editorial | 3100 | |
| 7069 | The Great Julya Calendar | dp | Statement | C1 | ABBYY Cup 3.0 - Finals (online version) {331} | PROGRAMMING | ABBYY Cup 3.0 — Finals. Solutions | 1200 | |
| 439 | The Great Julya Calendar | dp | Statement | C2 | ABBYY Cup 3.0 - Finals (online version) {331} | PROGRAMMING | ABBYY Cup 3.0 — Finals. Solutions | 2400 | |
| 621 | The Great Julya Calendar | dp | Statement | C3 | ABBYY Cup 3.0 - Finals (online version) {331} | PROGRAMMING | ABBYY Cup 3.0 — Finals. Solutions | 2500 | |
| 415 | Theft of Blueprints | graphs math | Statement | D | Codeforces Round 193 (Div. 2) {332} | PROGRAMMING | 8447 | 2400 | |
| 241 | Counting Skyscrapers | dp math probabilities | Statement | E | MemSQL start[c]up Round 2 - online version {335} | PROGRAMMING | MemSQL start[c]up Round 2 -- Editorial | 2900 | |
| 10643 | Vasily the Bear and Triangle | implementation math | Statement | A | Codeforces Round 195 (Div. 2) {336} | PROGRAMMING | Tutorial Codeforces Round #195 (Div. 2) | 1100 | |
| 1368 | Vasily the Bear and Fly | math | Statement | B | Codeforces Round 195 (Div. 2) {336} | PROGRAMMING | Tutorial Codeforces Round #195 (Div. 2) | 1900 | |
| 1212 | Vasily the Bear and Beautiful Strings | combinatorics math number theory | Statement | D | Codeforces Round 195 (Div. 2) {336} | PROGRAMMING | Tutorial Codeforces Round #195 (Div. 2) | 2400 | |
| 10050 | Routine Problem | greedy math number theory | Statement | B | Codeforces Round 196 (Div. 2) {337} | PROGRAMMING | Codeforces Round #196 — Problems Analysis | 1400 | |
| 5222 | Quiz | binary search greedy math matrices number theory | Statement | C | Codeforces Round 196 (Div. 2) {337} | PROGRAMMING | Codeforces Round #196 — Problems Analysis | 1700 | |
| 1392 | GCD Table | chinese remainder theorem math number theory | Statement | D | Codeforces Round 196 (Div. 1) {338} | PROGRAMMING | Codeforces Round #196 — Problems Analysis | 2700 | |
| 273166 | Helpful Maths | greedy implementation sortings strings | Statement | A | Codeforces Round 197 (Div. 2) {339} | PROGRAMMING | Codeforces Round #197 — Tutorial | 900 | |
| 8319 | The Wall | math | Statement | A | Codeforces Round 198 (Div. 2) {340} | PROGRAMMING | Tutorial | 1300 | |
| 4668 | Tourist Problem | combinatorics implementation math | Statement | C | Codeforces Round 198 (Div. 2) {340} | PROGRAMMING | Tutorial | 1700 | |
| 2742 | Iahub and Permutations | combinatorics math | Statement | E | Codeforces Round 198 (Div. 2) {340} | PROGRAMMING | Tutorial | 2200 | |
| 13849 | Xenia and Divisors | greedy implementation | Statement | A | Codeforces Round 199 (Div. 2) {342} | PROGRAMMING | Tutorial | 1300 | |
| 10064 | Rational Resistance | math number theory | Statement | A | Codeforces Round 200 (Div. 1) {343} | PROGRAMMING | Codeforces Round #200 Tutorial | 1600 | |
| 9575 | Simple Molecules | brute force graphs math | Statement | B | Codeforces Round 200 (Div. 2) {344} | PROGRAMMING | Codeforces Round #200 Tutorial | 1300 | |
| 531 | Expecting Trouble | *special probabilities | Statement | A | Friday the 13th, Programmers Day {345} | PROGRAMMING | 1600 | ||
| 129 | Triskaidekaphobia | *special | Statement | B | Friday the 13th, Programmers Day {345} | PROGRAMMING | 2000 | ||
| 9318 | Alice and Bob | games math number theory | Statement | A | Codeforces Round 201 (Div. 1) {346} | PROGRAMMING | Codeforces Round #201 Editorial | 1600 | |
| 4238 | Lucky Common Subsequence | dp strings | Statement | B | Codeforces Round 201 (Div. 1) {346} | PROGRAMMING | Codeforces Round #201 Editorial | 2000 | |
| 1499 | Number Transformation II | greedy math | Statement | C | Codeforces Round 201 (Div. 1) {346} | PROGRAMMING | Codeforces Round #201 Editorial | 2200 | |
| 293 | Doodle Jump | math number theory | Statement | E | Codeforces Round 201 (Div. 1) {346} | PROGRAMMING | Codeforces Round #201 Editorial | 3000 | |
| 9852 | Fixed Points | brute force implementation math | Statement | B | Codeforces Round 201 (Div. 2) {347} | PROGRAMMING | Codeforces Round #201 Editorial | 1200 | |
| 14638 | Mafia | binary search math sortings | Statement | A | Codeforces Round 202 (Div. 1) {348} | PROGRAMMING | Editorial for Codeforces Round #202 | 1700 | |
| 15097 | Color the Fence | data structures dp greedy implementation | Statement | B | Codeforces Round 202 (Div. 2) {349} | PROGRAMMING | Editorial for Codeforces Round #202 | 1700 | |
| 3093 | Jeff and Rounding | dp greedy implementation math | Statement | A | Codeforces Round 204 (Div. 1) {351} | PROGRAMMING | Codeforces Round #204 — tutorial | 1900 | |
| 2721 | Jeff and Furik | combinatorics dp probabilities | Statement | B | Codeforces Round 204 (Div. 1) {351} | PROGRAMMING | Codeforces Round #204 — tutorial | 2100 | |
| 28452 | Jeff and Digits | brute force implementation math | Statement | A | Codeforces Round 204 (Div. 2) {352} | PROGRAMMING | 1100 | ||
| 19970 | Domino | implementation math | Statement | A | Codeforces Round 205 (Div. 2) {353} | PROGRAMMING | 9145 | 1300 | |
| 5251 | Find Maximum | implementation math number theory | Statement | C | Codeforces Round 205 (Div. 2) {353} | PROGRAMMING | 9145 | 1600 | |
| 2430 | Two Heaps | combinatorics constructive algorithms greedy implementation math sortings | Statement | B | Codeforces Round 205 (Div. 2) {353} | PROGRAMMING | 9145 | 1800 | |
| 5652 | Vasya and Robot | brute force greedy math | Statement | A | Codeforces Round 206 (Div. 1) {354} | PROGRAMMING | Codeforces Round #206 — Editorial | 1600 | |
| 2085 | Xenia and Hamming | implementation math | Statement | B | Codeforces Round 207 (Div. 1) {356} | PROGRAMMING | 9210 | 2000 | |
| 8692 | Permutation | constructive algorithms dp math | Statement | B | Codeforces Round 209 (Div. 2) {359} | PROGRAMMING | Editorial Codeforces Round #209 (Div. 2) | 1400 | |
| 3551 | Prime Number | math number theory | Statement | C | Codeforces Round 209 (Div. 2) {359} | PROGRAMMING | Editorial Codeforces Round #209 (Div. 2) | 2000 | |
| 5705 | Pair of Numbers | binary search brute force data structures math two pointers | Statement | D | Codeforces Round 209 (Div. 2) {359} | PROGRAMMING | Editorial Codeforces Round #209 (Div. 2) | 2100 | |
| 8781 | Levko and Permutation | constructive algorithms math number theory | Statement | B | Codeforces Round 210 (Div. 2) {361} | PROGRAMMING | Codeforces Round #210 editorial | 1200 | |
| 2801 | Two Semiknights Meet | greedy math | Statement | A | Codeforces Round 212 (Div. 2) {362} | PROGRAMMING | Codeforces Round #212 (Div. 2). Tutorial. Part 1. | 1500 | |
| 2016 | 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 | |
| 2500 | Ghd | brute force math probabilities | Statement | D | Codeforces Round 213 (Div. 1) {364} | PROGRAMMING | Codeforces Round #213 Editorial | 2600 | |
| 843 | Dima and Magic Guitar | brute force implementation math | Statement | E | Codeforces Round 214 (Div. 2) {366} | PROGRAMMING | Codeforces Round #214 (Div. 2) — Tutorial | 2300 | |
| 1720 | Dima and Trap Graph | binary search data structures dfs and similar dsu shortest paths two pointers | Statement | D | Codeforces Round 214 (Div. 2) {366} | PROGRAMMING | Codeforces Round #214 (Div. 2) — Tutorial | 2400 | |
| 6847 | Valera and Contest | constructive algorithms implementation math | Statement | B | Codeforces Round 216 (Div. 2) {369} | PROGRAMMING | Editorial Codeforces Round #216 (Div. 2) | 1500 | |
| 11995 | Rook, Bishop and King | graphs math shortest paths | Statement | A | Codeforces Round 217 (Div. 2) {370} | PROGRAMMING | Codeforces Round #217 (Div. 2): tutorial | 1200 | |
| 1714 | Mittens | constructive algorithms greedy sortings | Statement | C | Codeforces Round 217 (Div. 2) {370} | PROGRAMMING | Codeforces Round #217 (Div. 2): tutorial | 1800 | |
| 6637 | K-Periodic Array | greedy implementation math | Statement | A | Codeforces Round 218 (Div. 2) {371} | PROGRAMMING | Codeforces Round #218 (Div. 2): Tutorial | 1200 | |
| 12515 | Fox Dividing Cheese | math number theory | Statement | B | Codeforces Round 218 (Div. 2) {371} | PROGRAMMING | Codeforces Round #218 (Div. 2): Tutorial | 1400 | |
| 1436 | Subway Innovation | greedy math two pointers | Statement | E | Codeforces Round 218 (Div. 2) {371} | PROGRAMMING | Codeforces Round #218 (Div. 2): Tutorial | 2200 | |
| 4904 | Watching Fireworks is Fun | data structures dp math | Statement | C | Codeforces Round 219 (Div. 1) {372} | PROGRAMMING | 9944 | 2400 | |
| 2784 | Making Sequences is Fun | binary search implementation math | Statement | B | Codeforces Round 219 (Div. 2) {373} | PROGRAMMING | Codeforces Round #219 editorial | 1600 | |
| 5331 | Divisible by Seven | math number theory | Statement | A | Codeforces Round 221 (Div. 1) {375} | PROGRAMMING | Codeforces Round #221 Tutorial | 1800 | |
| 485 | Red and Black Tree | dp implementation math | Statement | E | Codeforces Round 221 (Div. 1) {375} | PROGRAMMING | Codeforces Round #221 Tutorial | 3000 | |
| 9867 | Lever | implementation math | Statement | A | Codeforces Round 221 (Div. 2) {376} | PROGRAMMING | Codeforces Round #221 Tutorial | 1000 | |
| 1243 | Captains Mode | bitmasks dp games | Statement | C | Codeforces Round 222 (Div. 1) {377} | PROGRAMMING | Codeforces Round #222 — Problem Analysis | 2400 | |
| 521 | Sereja and Cinema | combinatorics math | Statement | D | Codeforces Round 223 (Div. 1) {380} | PROGRAMMING | Codeforces Round #223 — Tutorial | 2500 | |
| 1504 | Number Busters | binary search math | Statement | B | Codeforces Round 224 (Div. 2) {382} | PROGRAMMING | Codeforces Round #224 (Div. 2) Editorial | 2000 | |
| 10812 | 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 | |
| 10545 | 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 | |
| 664 | Bear in the Field | math matrices | Statement | E | Codeforces Round 226 (Div. 2) {385} | PROGRAMMING | Codeforces Round #226 (Div. 2) — Editorial | 2700 | |
| 2523 | Fly, freebies, fly! | binary search brute force implementation | Statement | B | Testing Round 9 {386} | PROGRAMMING | 1500 | ||
| 2597 | Fox and Minimal path | bitmasks constructive algorithms graphs implementation math | Statement | B | Codeforces Round 228 (Div. 1) {388} | PROGRAMMING | Codeforces Round #228 — Editorial | 2000 | |
| 496 | Fox and Perfect Sets | math | Statement | D | Codeforces Round 228 (Div. 1) {388} | PROGRAMMING | Codeforces Round #228 — Editorial | 2700 | |
| 14957 | Fox and Number Game | greedy math | Statement | A | Codeforces Round 228 (Div. 2) {389} | PROGRAMMING | Codeforces Round #228 — Editorial | 1100 | |
| 664 | Yet Another Number Sequence | combinatorics math matrices | Statement | C | Codeforces Round 230 (Div. 1) {392} | PROGRAMMING | 1500.0 | 83942 | |
| 1051 | Tower of Hanoi | dp | Statement | B | Codeforces Round 230 (Div. 1) {392} | PROGRAMMING | 1000.0 | 83942 | |
| 1006 | Blocked Points | math | Statement | A | Codeforces Round 230 (Div. 1) {392} | PROGRAMMING | 500.0 | 83942 | |
| 298 | Physical Education and Buns | brute force implementation math | Statement | D | Codeforces Round 231 (Div. 2) {394} | PROGRAMMING | 2000.0 | ||
| 620 | Very Beautiful Number | math | Statement | B | Codeforces Round 231 (Div. 2) {394} | PROGRAMMING | 1000.0 | ||
| 464 | On Sum of Number of Inversions in Permutations | combinatorics math | Statement | D | Codeforces Round 232 (Div. 1) {396} | PROGRAMMING | 2000.0 | Codeforces Round #232 Editorial (restored) | |
| 1626 | On Number of Decompositions into Multipliers | combinatorics math number theory | Statement | A | Codeforces Round 232 (Div. 1) {396} | PROGRAMMING | 500.0 | Codeforces Round #232 Editorial (restored) | |
| 167 | On Iteration of One Well-Known Function | math | Statement | E | Codeforces Round 232 (Div. 1) {396} | PROGRAMMING | 2500.0 | Codeforces Round #232 Editorial (restored) | |
| 1189 | On Sum of Fractions | math number theory | Statement | B | Codeforces Round 232 (Div. 1) {396} | PROGRAMMING | 1000.0 | Codeforces Round #232 Editorial (restored) | |
| 833 | On Corruption and Numbers | constructive algorithms implementation math | Statement | B | Codeforces Round 232 (Div. 2) {397} | PROGRAMMING | 1000.0 | Codeforces Round #232 Editorial (restored) | |
| 3004 | Inna and Huge Candy Matrix | implementation math | Statement | C | Codeforces Round 234 (Div. 2) {400} | PROGRAMMING | Codeforces Round #234 (Div. 2) — Tutorial | 1500 | |
| 4596 | Sereja and Contests | greedy implementation math | Statement | B | Codeforces Round 235 (Div. 2) {401} | PROGRAMMING | Codeforces Round #235 (Div. 2) — Tutorial | 1200 | |
| 4555 | Roman and Numbers | bitmasks brute force combinatorics dp number theory | Statement | D | Codeforces Round 235 (Div. 2) {401} | PROGRAMMING | Codeforces Round #235 (Div. 2) — Tutorial | 2000 | |
| 172 | Olympic Games | math | Statement | E | Codeforces Round 235 (Div. 2) {401} | PROGRAMMING | Codeforces Round #235 (Div. 2) — Tutorial | 2500 | |
| 17401 | Vanya and Cards | implementation math | Statement | A | Codeforces Round 235 (Div. 2) {401} | PROGRAMMING | Codeforces Round #235 (Div. 2) — Tutorial | 900 | |
| 4872 | Nuts | greedy math | Statement | A | Codeforces Round 236 (Div. 2) {402} | PROGRAMMING | Editorial Codeforces Round #236 | 1200 | |
| 2782 | Upgrading Array | dp greedy math number theory | Statement | D | Codeforces Round 236 (Div. 2) {402} | PROGRAMMING | Editorial Codeforces Round #236 | 2000 | |
| 2325 | Strictly Positive Matrix | graphs math | Statement | E | Codeforces Round 236 (Div. 2) {402} | PROGRAMMING | Editorial Codeforces Round #236 | 2200 | |
| 26149 | Valera and X | implementation | Statement | A | Codeforces Round 237 (Div. 2) {404} | PROGRAMMING | Codeforces Round #237 (Div. 2) Editorial | 1100 | |
| 3044 | Marathon | implementation math | Statement | B | Codeforces Round 237 (Div. 2) {404} | PROGRAMMING | Codeforces Round #237 (Div. 2) Editorial | 1500 | |
| 4925 | Unusual Product | implementation math | Statement | C | Codeforces Round 238 (Div. 2) {405} | PROGRAMMING | Codeforces Round #238 Tutorial | 1600 | |
| 3285 | Toy Sum | greedy implementation math | Statement | D | Codeforces Round 238 (Div. 2) {405} | PROGRAMMING | Codeforces Round #238 Tutorial | 1900 | |
| 272 | Hamming Triples | implementation math two pointers | Statement | E | Codeforces Round 238 (Div. 1) {406} | PROGRAMMING | Codeforces Round #238 Tutorial | 2700 | |
| 5165 | Triangle | brute force geometry implementation math | Statement | A | Codeforces Round 239 (Div. 1) {407} | PROGRAMMING | Codeforces Round #239 Editorial | 1700 | |
| 1189 | Curious Array | brute force combinatorics implementation math | Statement | C | Codeforces Round 239 (Div. 1) {407} | PROGRAMMING | Codeforces Round #239 Editorial | 2500 | |
| 2674 | Jeopardy! | greedy math | Statement | C | Coder-Strike 2014 - Round 2 {413} | PROGRAMMING | Editorial of Coder-Strike 2014 Round 2 | 1400 | |
| 6683 | Mashmokh and Tokens | binary search greedy implementation math | Statement | B | Codeforces Round 240 (Div. 2) {415} | PROGRAMMING | Codeforces Round #240 Editorial | 1500 | |
| 1089 | Population Size | greedy implementation math | Statement | D | Codeforces Round 241 (Div. 2) {416} | PROGRAMMING | Codeforces Round #241 — editorial | 2300 | |
| 3407 | Elimination | dp implementation math | Statement | A | RCC 2014 Warmup (Div. 2) {417} | PROGRAMMING | RCC 2014 WarmUp Analysis | 1500 | |
| 927 | Square Table | constructive algorithms math probabilities | Statement | E | RCC 2014 Warmup (Div. 2) {417} | PROGRAMMING | RCC 2014 WarmUp Analysis | 2400 | |
| 5940 | Magic Formulas | math | Statement | C | Codeforces Round 242 (Div. 2) {424} | PROGRAMMING | Codeforces Round #242 (Div. 2) Editorial | 1600 | |
| 1606 | Police Patrol | greedy implementation math ternary search | Statement | E | Codeforces Round 244 (Div. 2) {427} | PROGRAMMING | Codeforces Round #244 (Div. 2) Editorial | 2000 | |
| 2871 | Random Task | binary search bitmasks combinatorics dp math | Statement | D | Codeforces Round 247 (Div. 2) {431} | PROGRAMMING | Editorial Codeforces Round #247 (Div. 2) | 2200 | |
| 2617 | Ryouko's Memory Note | implementation math sortings | Statement | C | Codeforces Round 248 (Div. 2) {433} | PROGRAMMING | Codeforces Round #248 Editorial | 1900 | |
| 3146 | Om Nom and Spiders | implementation math | Statement | B | Zepto Code Rush 2014 {436} | PROGRAMMING | Zepto Code Rush 2014 — solutions A-D | 1400 | |
| 11480 | The Child and Sequence | data structures math | Statement | D | Codeforces Round 250 (Div. 1) {438} | PROGRAMMING | Tutorial | 2300 | |
| 1835 | Devu and Birthday Celebration | combinatorics dp math | Statement | E | Codeforces Round 251 (Div. 2) {439} | PROGRAMMING | Codeforces Round #251 Editorial | 2600 | |
| 1196 | 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 | |
| 815 | Valera and Number | bitmasks dp math probabilities | Statement | E | Codeforces Round 252 (Div. 2) {441} | PROGRAMMING | Разбор Codeforces Round #252 (Div. 2) | 2700 | |
| 6082 | Andrey and Problem | greedy math probabilities | Statement | B | Codeforces Round 253 (Div. 1) {442} | PROGRAMMING | Codeforces #253 editorial | 1800 | |
| 3575 | DZY Loves Physics | greedy math | Statement | A | Codeforces Round 254 (Div. 1) {444} | PROGRAMMING | Codeforces Round #254 Editorial | 1800 | |
| 3914 | DZY Loves Fibonacci Numbers | data structures math number theory | Statement | C | Codeforces Round #FF (Div. 1) {446} | PROGRAMMING | Codeforces Round #FF(255) Editorial | 2600 | |
| 463 | DZY Loves Games | math matrices probabilities | Statement | D | Codeforces Round #FF (Div. 1) {446} | PROGRAMMING | Codeforces Round #FF(255) Editorial | 2800 | |
| 143 | DZY Loves Bridges | math matrices | Statement | E | Codeforces Round #FF (Div. 1) {446} | PROGRAMMING | Codeforces Round #FF(255) Editorial | 3100 | |
| 4121 | Jzzhu and Chocolate | greedy math | Statement | A | Codeforces Round 257 (Div. 1) {449} | PROGRAMMING | Codeforces Round #257 Editorial | 1700 | |
| 305 | Jzzhu and Squares | dp math number theory | Statement | E | Codeforces Round 257 (Div. 1) {449} | PROGRAMMING | Codeforces Round #257 Editorial | 2900 | |
| 28772 | Jzzhu and Sequences | implementation math | Statement | B | Codeforces Round 257 (Div. 2) {450} | PROGRAMMING | Codeforces Round #257 Editorial | 1400 | |
| 3577 | Predict Outcome of the Game | brute force implementation math | Statement | C | Codeforces Round 258 (Div. 2) {451} | PROGRAMMING | Codeforces Round #258 Editorial | 1700 | |
| 5055 | Count Good Substrings | math | Statement | D | Codeforces Round 258 (Div. 2) {451} | PROGRAMMING | Codeforces Round #258 Editorial | 2100 | |
| 1748 | Magic Trick | combinatorics math probabilities | Statement | C | MemSQL Start[c]UP 2.0 - Round 1 {452} | PROGRAMMING | MemSQL Start[c]UP 2.0 Round 1 and 2 Editorials | 2100 | |
| 18512 | Fedya and Maths | math number theory | Statement | B | Codeforces Round 260 (Div. 2) {456} | PROGRAMMING | Codeforces Round #260 — Editorial | 1200 | |
| 1374 | Golden System | math meet-in-the-middle | Statement | A | MemSQL Start[c]UP 2.0 - Round 2 {457} | PROGRAMMING | MemSQL Start[c]UP 2.0 Round 1 and 2 Editorials | 1800 | |
| 388 | Bingo! | combinatorics math probabilities | Statement | D | MemSQL Start[c]UP 2.0 - Round 2 {457} | PROGRAMMING | MemSQL Start[c]UP 2.0 Round 1 and 2 Editorials | 2700 | |
| 121 | Flow Optimality | constructive algorithms flows math | Statement | E | MemSQL Start[c]UP 2.0 - Round 2 {457} | PROGRAMMING | MemSQL Start[c]UP 2.0 Round 1 and 2 Editorials | 3200 | |
| 6480 | Pashmak and Buses | combinatorics constructive algorithms math | Statement | C | Codeforces Round 261 (Div. 2) {459} | PROGRAMMING | Codeforces Round #261 Editorial | 1900 | |
| 51875 | Vasya and Socks | brute force implementation math | Statement | A | Codeforces Round 262 (Div. 2) {460} | PROGRAMMING | 13465 | 1000 | |
| 13359 | Little Dima and Equation | brute force implementation math number theory | Statement | B | Codeforces Round 262 (Div. 2) {460} | PROGRAMMING | 13465 | 1500 | |
| 1036 | Little Victor and Set | brute force constructive algorithms math | Statement | D | Codeforces Round 262 (Div. 2) {460} | PROGRAMMING | 13465 | 2500 | |
| 381 | Roland and Rose | brute force geometry math sortings | Statement | E | Codeforces Round 262 (Div. 2) {460} | PROGRAMMING | 13465 | 2700 | |
| 400 | Appleman and Complicated Task | dsu math | Statement | D | Codeforces Round 263 (Div. 1) {461} | PROGRAMMING | Tutorial | 2700 | |
| 29914 | Caisa and Pylons | brute force implementation math | Statement | B | Codeforces Round 264 (Div. 2) {463} | PROGRAMMING | CF 264 Div 2 Tutorial | 1200 | |
| 7273 | Gargari and Permutations | dfs and similar dp graphs implementation | Statement | D | Codeforces Round 264 (Div. 2) {463} | PROGRAMMING | CF 264 Div 2 Tutorial | 2000 | |
| 1739 | Caisa and Tree | brute force dfs and similar math number theory trees | Statement | E | Codeforces Round 264 (Div. 2) {463} | PROGRAMMING | CF 264 Div 2 Tutorial | 2400 | |
| 76688 | Cheap Travel | implementation | Statement | A | Codeforces Round 266 (Div. 2) {466} | PROGRAMMING | Editorial Codeforces Round #266 (Div. 2) | 1200 | |
| 5259 | Wonder Room | brute force math | Statement | B | Codeforces Round 266 (Div. 2) {466} | PROGRAMMING | Editorial Codeforces Round #266 (Div. 2) | 1800 | |
| 8393 | 24 Game | constructive algorithms greedy math | Statement | A | Codeforces Round 268 (Div. 1) {468} | PROGRAMMING | 13896 | 1600 | |
| 2736 | Hack it! | binary search constructive algorithms math | Statement | C | Codeforces Round 268 (Div. 1) {468} | PROGRAMMING | 13896 | 2800 | |
| 385 | Permanent | dp graph matchings math meet-in-the-middle | Statement | E | Codeforces Round 268 (Div. 1) {468} | PROGRAMMING | 13896 | 3100 | |
| 3732 | MUH and House of Cards | binary search brute force greedy math | Statement | C | Codeforces Round 269 (Div. 2) {471} | PROGRAMMING | Codeforces Round #269 Editorial | 1700 | |
| 300 | Design Tutorial: Change the Goal | constructive algorithms math matrices | Statement | F | Codeforces Round 270 {472} | PROGRAMMING | 2600 | ||
| 70465 | Design Tutorial: Learn from Math | math number theory | Statement | A | Codeforces Round 270 {472} | PROGRAMMING | Editorial | 900 | |
| 11492 | Ant colony | data structures math number theory | Statement | F | Codeforces Round 271 (Div. 2) {474} | PROGRAMMING | Codeforces Round #271 (Div. 2) Editorial | 2200 | |
| 6459 | CGCDSSQ | brute force data structures math | Statement | D | Bayan 2015 Contest Warm Up {475} | PROGRAMMING | Bayan 2015 Contest Warm Up Editorial | 2000 | |
| 51431 | Dreamoon and Stairs | implementation math | Statement | A | Codeforces Round 272 (Div. 2) {476} | PROGRAMMING | Editorial | 1100 | |
| 36817 | Dreamoon and WiFi | bitmasks brute force combinatorics dp math probabilities | Statement | B | Codeforces Round 272 (Div. 2) {476} | PROGRAMMING | 1300 | ||
| 6018 | Dreamoon and Sums | math | Statement | C | Codeforces Round 272 (Div. 2) {476} | PROGRAMMING | Editorial | 1700 | |
| 5023 | Dreamoon and Sets | constructive algorithms greedy math | Statement | D | Codeforces Round 272 (Div. 2) {476} | PROGRAMMING | Editorial | 2000 | |
| 41118 | Random Teams | combinatorics constructive algorithms greedy math | Statement | B | Codeforces Round 273 (Div. 2) {478} | PROGRAMMING | Editorial | 1300 | |
| 111792 | Expression | brute force math | Statement | A | Codeforces Round 274 (Div. 2) {479} | PROGRAMMING | Codeforces Round #274: editorial | 1100 | |
| 24841 | Counterexample | brute force implementation math number theory | Statement | A | Codeforces Round 275 (Div. 2) {483} | PROGRAMMING | Codeforces Round #275 Editorial | 1100 | |
| 4310 | Friends and Presents | binary search math | Statement | B | Codeforces Round 275 (Div. 2) {483} | PROGRAMMING | Codeforces Round #275 Editorial | 1800 | |
| 7709 | Maximum Value | binary search math sortings two pointers | Statement | B | Codeforces Round 276 (Div. 1) {484} | PROGRAMMING | Codeforces Round #276 — Editorial | 2100 | |
| 626 | Strange Sorting | implementation math | Statement | C | Codeforces Round 276 (Div. 1) {484} | PROGRAMMING | Codeforces Round #276 — Editorial | 2600 | |
| 8748 | Factory | implementation math matrices | Statement | A | Codeforces Round 276 (Div. 2) {485} | PROGRAMMING | Codeforces Round #276 — Editorial | 1400 | |
| 153193 | Calculating Function | implementation math | Statement | A | Codeforces Round 277 (Div. 2) {486} | PROGRAMMING | Codeforces Round #277(Div. 2) Editorial | 1100 | |
| 4375 | Valid Sets | dfs and similar dp math trees | Statement | D | Codeforces Round 277 (Div. 2) {486} | PROGRAMMING | Codeforces Round #277(Div. 2) Editorial | 2300 | |
| 2621 | LIS of Sequence | data structures dp greedy hashing math | Statement | E | Codeforces Round 277 (Div. 2) {486} | PROGRAMMING | Codeforces Round #277(Div. 2) Editorial | 2400 | |
| 3075 | Prefix Product Sequence | constructive algorithms math number theory | Statement | C | Codeforces Round 278 (Div. 1) {487} | PROGRAMMING | Tutorial | 2600 | |
| 2262 | Candy Boxes | brute force constructive algorithms math | Statement | B | Codeforces Round 278 (Div. 2) {488} | PROGRAMMING | Tutorial | 1800 | |
| 9462 | Hacking Cypher | brute force math number theory strings | Statement | C | Codeforces Round 279 (Div. 2) {490} | PROGRAMMING | Codeforces Round #279 (Div. 2) Editorial | 1700 | |
| 2313 | Chocolate | brute force dfs and similar math meet-in-the-middle number theory | Statement | D | Codeforces Round 279 (Div. 2) {490} | PROGRAMMING | Codeforces Round #279 (Div. 2) Editorial | 1900 | |
| 70095 | Team Olympiad | greedy implementation sortings | Statement | A | Codeforces Round 279 (Div. 2) {490} | PROGRAMMING | Codeforces Round #279 (Div. 2) Editorial | 900 | |
| 653 | New York Hotel | greedy math | Statement | B | Testing Round 11 {491} | PROGRAMMING | 1900 | ||
| 89767 | Vanya and Lanterns | binary search implementation math sortings | Statement | B | Codeforces Round 280 (Div. 2) {492} | PROGRAMMING | Разбор задач | 1200 | |
| 3317 | Vanya and Computer Game | binary search implementation math sortings | Statement | D | Codeforces Round 280 (Div. 2) {492} | PROGRAMMING | Разбор задач | 1800 | |
| 1753 | Vanya and Field | math | Statement | E | Codeforces Round 280 (Div. 2) {492} | PROGRAMMING | Разбор задач | 2200 | |
| 10191 | Vasya and Chess | constructive algorithms games math | Statement | D | Codeforces Round 281 (Div. 2) {493} | PROGRAMMING | Codeforces Round #281 (Div. 2) Editorial | 1700 | |
| 517 | Vasya and Polynomial | math | Statement | E | Codeforces Round 281 (Div. 2) {493} | PROGRAMMING | Codeforces Round #281 (Div. 2) Editorial | 2900 | |
| 8248 | Modular Equations | math number theory | Statement | B | Codeforces Round 282 (Div. 2) {495} | PROGRAMMING | Tutorial | 1600 | |
| 17162 | Minimum Difficulty | brute force implementation math | Statement | A | Codeforces Round 283 (Div. 2) {496} | PROGRAMMING | Codeforces Round #283: editorial (with bonuses!) | 1000 | |
| 247 | Gears | brute force geometry math | Statement | D | Codeforces Round 283 (Div. 1) {497} | PROGRAMMING | 2800 | ||
| 6031 | New Year Book Reading | constructive algorithms greedy implementation math | Statement | C | Good Bye 2014 {500} | PROGRAMMING | Tutorial 2 | 1600 | |
| 9584 | New Year Permutation | dfs and similar dsu graphs greedy math sortings | Statement | B | Good Bye 2014 {500} | PROGRAMMING | Tutorial 2 | 1600 | |
| 348 | Misha and XOR | bitmasks | Statement | D | Codeforces Round 285 (Div. 1) {504} | PROGRAMMING | 15743 | 2700 | |
| 26644 | Amr and Pins | geometry math | Statement | B | Codeforces Round 287 (Div. 2) {507} | PROGRAMMING | Editorial | 1400 | |
| 4554 | Guess Your Way Out! | implementation math trees | Statement | C | Codeforces Round 287 (Div. 2) {507} | PROGRAMMING | Editorial | 1700 | |
| 2122 | The Maths Lecture | dp implementation | Statement | D | Codeforces Round 287 (Div. 2) {507} | PROGRAMMING | Editorial | 2500 | |
| 23968 | Anton and currency you all know | greedy math strings | Statement | B | Codeforces Round 288 (Div. 2) {508} | PROGRAMMING | 16048 | 1300 | |
| 1880 | Pretty Song | math strings | Statement | E | Codeforces Round 289 (Div. 2, ACM ICPC Rules) {509} | PROGRAMMING | Tutorial CodeForces Round 289 (Div.2) (Second Winter Computer Camp Selection 2015) | 2000 | |
| 813 | Restoring Numbers | constructive algorithms math | Statement | D | Codeforces Round 289 (Div. 2, ACM ICPC Rules) {509} | PROGRAMMING | Tutorial CodeForces Round 289 (Div.2) (Second Winter Computer Camp Selection 2015) | 2400 | |
| 6394 | Fox And Jumping | bitmasks brute force dp math | Statement | D | Codeforces Round 290 (Div. 2) {510} | PROGRAMMING | Codeforces Round #290 Editorial | 2100 | |
| 2927 | Permutations | bitmasks divide and conquer math | Statement | B2 | Rockethon 2015 {513} | PROGRAMMING | 16260 | 1800 | |
| 21836 | Game | constructive algorithms math | Statement | A | Rockethon 2015 {513} | PROGRAMMING | 16260 | 900 | |
| 22588 | 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 | |
| 21944 | Drazil and Date | math | Statement | A | Codeforces Round 292 (Div. 2) {515} | PROGRAMMING | Codeforces Round #292 Editorial | 1100 | |
| 28656 | Drazil and Factorial | greedy math sortings | Statement | C | Codeforces Round 292 (Div. 2) {515} | PROGRAMMING | Codeforces Round #292 Editorial | 1400 | |
| 605 | Drazil and His Happy Friends | math number theory | Statement | E | Codeforces Round 292 (Div. 1) {516} | PROGRAMMING | 16468 | 3000 | |
| 8129 | Ilya and Escalator | combinatorics dp math probabilities | Statement | D | Codeforces Round 293 (Div. 2) {518} | PROGRAMMING | Codeforces Round #293 (Div.2) Editorial | 1900 | |
| 1061 | Arthur and Questions | greedy implementation math ternary search | Statement | E | Codeforces Round 293 (Div. 2) {518} | PROGRAMMING | 2400 | ||
| 20690 | A and B and Team Training | greedy implementation math number theory | Statement | C | Codeforces Round 294 (Div. 2) {519} | PROGRAMMING | Editorial | 1300 | |
| 61809 | 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 | |
| 4319 | DNA Alignment | math strings | Statement | C | Codeforces Round 295 (Div. 2) {520} | PROGRAMMING | Codeforces Round #295 Editorial (now with bonuses!) | 1700 | |
| 2083 | Pluses everywhere | combinatorics dp math number theory | Statement | E | Codeforces Round 295 (Div. 2) {520} | PROGRAMMING | Codeforces Round #295 Editorial (now with bonuses!) | 2500 | |
| 991 | Mean Requests | *special implementation | Statement | B | VK Cup 2015 - Qualification Round 2 {523} | PROGRAMMING | Разбор задач VK Cup 2015 — Квалификация 2 | 1800 |