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Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 419 | Lesson Timetable | combinatorics dp math | Statement | D | Codeforces Beta Round 37 {37} | PROGRAMMING | 2300 | ||
| 2681 | Array | combinatorics math | Statement | C | Codeforces Beta Round 53 {57} | PROGRAMMING | Codeforces Beta Round #53 [Analysis] | 1900 | |
| 119 | Sleeping | combinatorics implementation math | Statement | E | Codeforces Beta Round 86 (Div. 1 Only) {113} | PROGRAMMING | 2600 | ||
| 11211 | The World is a Theatre | combinatorics math | Statement | C | Codeforces Beta Round 95 (Div. 2) {131} | PROGRAMMING | Разбор Codeforces Beta Round #95 (Div.2) | 1500 | |
| 1911 | Lucky Subsequence | combinatorics dp math | Statement | C | Codeforces Round 104 (Div. 1) {145} | PROGRAMMING | Codeforces Round #104 - Editorial | 2200 | |
| 4211 | Quantity of Strings | combinatorics dfs and similar graphs math | Statement | B | Codeforces Round 107 (Div. 1) {150} | PROGRAMMING | Tutorial | 1800 | |
| 389 | Cowboys | combinatorics dp math | Statement | C | VK Cup 2012 Finals (unofficial online-version) {212} | PROGRAMMING | 2200 | ||
| 1626 | Triangles | combinatorics graphs math | Statement | C | Codeforces Round 142 (Div. 1) {229} | PROGRAMMING | Codeforces Round #142 Problem Analysis | 2100 | |
| 774 | Cow Tennis Tournament | combinatorics data structures math | Statement | E | Codeforces Round 174 (Div. 1) {283} | PROGRAMMING | 2700 | ||
| 1000 | Positions in Permutations | combinatorics dp math | Statement | E | Codeforces Round 175 (Div. 2) {285} | PROGRAMMING | Codeforces Round #175 (Div. 2) Tutorial | 2600 | |
| 512 | Olya and Graph | combinatorics math | Statement | D | Codeforces Round 184 (Div. 2) {305} | PROGRAMMING | 2600 | ||
| 2803 | Malek Dance Club | combinatorics math | Statement | A | Codeforces Round 189 (Div. 1) {319} | PROGRAMMING | Codeforces Round #189 — Editorial | 1700 | |
| 11867 | Ciel and Flowers | combinatorics math | Statement | B | Codeforces Round 190 (Div. 2) {322} | PROGRAMMING | Codeforces Round #190 — Editorial | 1600 | |
| 3224 | Magic Five | combinatorics math | Statement | C | Codeforces Round 191 (Div. 2) {327} | PROGRAMMING | fegh | 1700 | |
| 4238 | Tourist Problem | combinatorics implementation math | Statement | C | Codeforces Round 198 (Div. 2) {340} | PROGRAMMING | Tutorial | 1700 | |
| 2480 | Iahub and Permutations | combinatorics math | Statement | E | Codeforces Round 198 (Div. 2) {340} | PROGRAMMING | Tutorial | 2200 | |
| 468 | Sereja and Cinema | combinatorics math | Statement | D | Codeforces Round 223 (Div. 1) {380} | PROGRAMMING | Codeforces Round #223 — Tutorial | 2500 | |
| 437 | 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) | |
| 1572 | Devu and Birthday Celebration | combinatorics dp math | Statement | E | Codeforces Round 251 (Div. 2) {439} | PROGRAMMING | Codeforces Round #251 Editorial | 2600 | |
| 6191 | Pashmak and Buses | combinatorics constructive algorithms math | Statement | C | Codeforces Round 261 (Div. 2) {459} | PROGRAMMING | Codeforces Round #261 Editorial | 1900 | |
| 36841 | Random Teams | combinatorics constructive algorithms greedy math | Statement | B | Codeforces Round 273 (Div. 2) {478} | PROGRAMMING | Editorial | 1300 | |
| 8709 | Kyoya and Colored Balls | combinatorics dp math | Statement | A | Codeforces Round 309 (Div. 1) {553} | PROGRAMMING | Codeforces Round #309 Editorial | 1700 | |
| 2212 | Vitaly and Cycle | combinatorics dfs and similar graphs math | Statement | D | Codeforces Round 311 (Div. 2) {557} | PROGRAMMING | Codeforces Round #311 (Div.2) Editorial | 2300 | |
| 2250 | Symmetric and Transitive | combinatorics dp math | Statement | B | Codeforces Round 315 (Div. 1) {568} | PROGRAMMING | 2100 | ||
| 2330 | 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 | |
| 23485 | Pasha and Stick | combinatorics math | Statement | A | Codeforces Round 337 (Div. 2) {610} | PROGRAMMING | Codeforces Round #337 (Div.2) Editorial | 1000 | |
| 1717 | Square Root of Permutation | combinatorics constructive algorithms dfs and similar graphs math | Statement | E | Educational Codeforces Round 4 {612} | PROGRAMMING | 22299 | 2200 | |
| 550 | Transforming Sequence | combinatorics dp fft math | Statement | E | AIM Tech Round (Div. 1) {623} | PROGRAMMING | AIM Tech Round Tutorial | 3300 | |
| 22293 | Lucky Numbers | combinatorics math | Statement | C | Experimental Educational Round: VolBIT Formulas Blitz {630} | PROGRAMMING | Разбор задач Experimental Educational Round: VolBIT Formulas Blitz | 1100 | |
| 6952 | Selection of Personnel | combinatorics math | Statement | F | Experimental Educational Round: VolBIT Formulas Blitz {630} | PROGRAMMING | Разбор задач Experimental Educational Round: VolBIT Formulas Blitz | 1500 | |
| 5038 | Benches | combinatorics math | Statement | H | Experimental Educational Round: VolBIT Formulas Blitz {630} | PROGRAMMING | Разбор задач Experimental Educational Round: VolBIT Formulas Blitz | 1700 | |
| 2785 | Challenge Pennants | combinatorics math | Statement | G | Experimental Educational Round: VolBIT Formulas Blitz {630} | PROGRAMMING | Разбор задач Experimental Educational Round: VolBIT Formulas Blitz | 1800 | |
| 6855 | Parking Lot | combinatorics math | Statement | I | Experimental Educational Round: VolBIT Formulas Blitz {630} | PROGRAMMING | Разбор задач Experimental Educational Round: VolBIT Formulas Blitz | 1900 | |
| 4494 | Directed Roads | combinatorics dfs and similar graphs math | Statement | D | Codeforces Round 369 (Div. 2) {711} | PROGRAMMING | 1900 | ||
| 1843 | Memory and Scores | combinatorics dp math | Statement | D | Codeforces Round 370 (Div. 2) {712} | PROGRAMMING | 2100 | ||
| 357 | Complete the Permutations | combinatorics fft graphs math | Statement | E | Codeforces Round 372 (Div. 1) {715} | PROGRAMMING | 3400 | ||
| 7537 | Tennis Championship | combinatorics constructive algorithms greedy math | Statement | C | Codeforces Round 382 (Div. 2) {735} | PROGRAMMING | Codeforces Round #382 Editorial | 1700 | |
| 179 | Byteland coins | combinatorics dp math | Statement | E | 8VC Venture Cup 2017 - Final Round {756} | PROGRAMMING | 3200 | ||
| 346 | Replace All | combinatorics dp math | Statement | G | Tinkoff Challenge - Final Round (Codeforces Round 414, rated, Div. 1 + Div. 2) {794} | PROGRAMMING | 3400 | ||
| 9684 | Minimum number of steps | combinatorics greedy implementation math | Statement | B | Codeforces Round 411 (Div. 1) {804} | PROGRAMMING | Codeforces Round #411 Editorial | 1400 | |
| 7477 | Rectangles | combinatorics math | Statement | B | AIM Tech Round 4 (Div. 2) {844} | PROGRAMMING | AIM Tech Round 4 -- Editorial | 1300 | |
| 212 | Days of Floral Colours | combinatorics divide and conquer dp fft math | Statement | E | Codeforces Round 431 (Div. 1) {848} | PROGRAMMING | 3400 | ||
| 625 | Eleventh Birthday | combinatorics dp math | Statement | C | Russian Code Cup 2017 - Finals [Unofficial Mirror, Div. 1 Only Recommended, Teams Allowed] {856} | PROGRAMMING | 2400 | ||
| 4728 | The Intriguing Obsession | combinatorics dp math | Statement | C | Codeforces Round 439 (Div. 2) {869} | PROGRAMMING | 1800 | ||
| 1027 | Maximum Element | combinatorics dp math | Statement | E | Технокубок 2018 - Отборочный Раунд 3 {886} | PROGRAMMING | Editorial Codeforces Round 445 (and Technocup 2018 — Elimination Round 3) | 2500 | |
| 8484 | Almost Identity Permutations | combinatorics dp math | Statement | D | Educational Codeforces Round 32 {888} | PROGRAMMING | Educational Codeforces Round 32 - Editorial | 1600 | |
| 2893 | Team Work | combinatorics dp math | Statement | E | ICM Technex 2018 and Codeforces Round 463 (Div. 1 + Div. 2, combined) {932} | PROGRAMMING | 57796 | 2400 | |
| 1329 | Max History | combinatorics math | Statement | E | Educational Codeforces Round 38 (Rated for Div. 2) {938} | PROGRAMMING | Educational Codeforces Round 38 — Editorial | 2300 | |
| 1073 | Bandit Blues | combinatorics dp fft math | Statement | G | Divide by Zero 2018 and Codeforces Round 474 (Div. 1 + Div. 2, combined) {960} | PROGRAMMING | Divide by Zero 2018 and Codeforces Round #474 (Div. 1 + Div. 2, combined) Editorial | 2800 | |
| 9604 | Bus Video System | combinatorics math | Statement | E | Codeforces Round 481 (Div. 3) {978} | PROGRAMMING | T | 1400 | |
| 271 | K Paths | combinatorics data structures dp fft math | Statement | H | Avito Code Challenge 2018 {981} | PROGRAMMING | Avito Code Challenge 2018 — разбор | 2900 | |
| 4682 | Petr and Permutations | combinatorics math | Statement | B | Codeforces Round 485 (Div. 1) {986} | PROGRAMMING | Codeforces Round #485 Editorial | 1800 | |
| 1737 | Sky Full of Stars | combinatorics math | Statement | C | Codeforces Round 493 (Div. 1) {997} | PROGRAMMING | 60357 | 2600 | |
| 2137 | Inverse Coloring | combinatorics dp math | Statement | E | Educational Codeforces Round 49 (Rated for Div. 2) {1027} | PROGRAMMING | Educational Codeforces Round 49 Editorial | 2100 | |
| 1149 | Maximum Reduction | combinatorics data structures math | Statement | F | Manthan, Codefest 18 (rated, Div. 1 + Div. 2) {1037} | PROGRAMMING | Tutorial | 2400 | |
| 7340 | Colorful Bricks | combinatorics dp math | Statement | C | Avito Cool Challenge 2018 {1081} | PROGRAMMING | 63888 | 1600 | |
| 6811 | New Year and the Permutation Concatenation | combinatorics dp math | Statement | D | Good Bye 2018 {1091} | PROGRAMMING | Editorial | 1700 | |
| 10436 | Ayoub and Lost Array | combinatorics dp math | Statement | C | Codeforces Round 533 (Div. 2) {1105} | PROGRAMMING | Tutorial | 1500 | |
| 972 | Destroy the Colony | combinatorics dp math | Statement | D | CodeCraft-19 and Codeforces Round 537 (Div. 2) {1111} | PROGRAMMING | CodeCraft-19 and Codeforces Round #537 (Div. 2) Editorial | 2500 | |
| 3350 | Number of Components | combinatorics data structures dp math | Statement | E | Codeforces Round 553 (Div. 2) {1151} | PROGRAMMING | Codeforces Round #553 (Div. 2) Editorial | 2100 | |
| 12027 | Tiles | combinatorics greedy math | Statement | C | Codeforces Global Round 4 {1178} | PROGRAMMING | E | 1300 | |
| 1529 | Wrong Answer on test 233 (Hard Version) | combinatorics math | Statement | F2 | Technocup 2020 - Elimination Round 3 {1227} | PROGRAMMING | Разбор задач №2 | 2400 | |
| 2780 | Another Filling the Grid | combinatorics dp math | Statement | E | Codeforces Round 589 (Div. 2) {1228} | PROGRAMMING | 70162 | 2300 | |
| 11136 | Alice and the List of Presents | combinatorics math | Statement | B | Codeforces Round 593 (Div. 2) {1236} | PROGRAMMING | 70654 | 1400 | |
| 7380 | Ivan the Fool and the Probability Theory | combinatorics dp math | Statement | A | Codeforces Round 594 (Div. 1) {1239} | PROGRAMMING | Editorial of Codeforces Round #594 (on the problems of Moscow Team Olympiad) | 1700 | |
| 1959 | Key Storage | combinatorics math | Statement | K | 2019-2020 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1267} | PROGRAMMING | nerc-2019-tutorial.pdf | 2200 | |
| 66 | Intergalactic Sliding Puzzle | combinatorics constructive algorithms math | Statement | F | Codeforces Round 607 (Div. 1) {1280} | PROGRAMMING | Codeforces Round #607 Editorial | 3400 | |
| 8089 | New Year and Permutation | combinatorics math | Statement | C | Hello 2020 {1284} | PROGRAMMING | Hello 2020 Editorial | 1700 | |
| 21306 | JOE is on TV! | combinatorics greedy math | Statement | B | Codeforces Round 614 (Div. 2) {1293} | PROGRAMMING | 750.0 | Codeforces Round #614 Editorial | 1000 |
| 9545 | Count the Arrays | combinatorics math | Statement | D | Educational Codeforces Round 83 (Rated for Div. 2) {1312} | PROGRAMMING | 74640 | ||
| 15675 | Permutation Partitions | combinatorics greedy math | Statement | C | Codeforces Global Round 7 {1326} | PROGRAMMING | 1000.0 | 74961 | 1300 |
| 8994 | Count The Blocks | combinatorics dp math | Statement | E | Educational Codeforces Round 84 (Rated for Div. 2) {1327} | PROGRAMMING | Educational Codeforces Round 84 Editorial | 1800 | |
| 29304 | K-th Beautiful String | combinatorics implementation math | Statement | B | Codeforces Round 629 (Div. 3) {1328} | PROGRAMMING | 75246 | 1300 | |
| 3111 | Placing Rooks | combinatorics fft math | Statement | E | Educational Codeforces Round 86 (Rated for Div. 2) {1342} | PROGRAMMING | 76633 | 2300 |