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< 1 2Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 337 | Mashtali vs AtCoder | games trees | Statement | I | Codeforces Global Round 17 {1610} | PROGRAMMING | 4000.0 | Codeforces Global Round 17 Editorial | |
| 384 | Reindeer Games | constructive algorithms flows graphs shortest paths | Statement | H | Codeforces Global Round 18 {1615} | PROGRAMMING | 4000.0 | Global Round 18 Editorial | |
| 1696 | Purple Crayon | dp games greedy math trees | Statement | E | Codeforces Global Round 18 {1615} | PROGRAMMING | 2750.0 | Global Round 18 Editorial | |
| 1008 | Christmas Chocolates | dfs and similar dp games graphs implementation math number theory shortest paths trees | Statement | E | Codeforces Round 761 (Div. 2) {1617} | PROGRAMMING | 3000.0 | Editorial for Codeforces Round #761 (Div. 2) | |
| 2334 | Let's Play the Hat? | constructive algorithms math | Statement | F | Codeforces Round 762 (Div. 3) {1619} | PROGRAMMING | Tutorial | ||
| 17537 | Not Sitting | games greedy sortings | Statement | B | Codeforces Round 766 (Div. 2) {1627} | PROGRAMMING | 1250.0 | Codeforces Round #766 (Div. 2) Editorial | |
| 3684 | Game on Sum (Easy Version) | combinatorics dp games | Statement | D1 | Codeforces Round 767 (Div. 1) {1628} | PROGRAMMING | 1000.0 | 99276 | |
| 2608 | Game on Sum (Hard Version) | combinatorics dp games | Statement | D2 | Codeforces Round 767 (Div. 1) {1628} | PROGRAMMING | 750.0 | 99276 | |
| 620 | Birthday | constructive algorithms math | Statement | G | Codeforces Global Round 19 {1637} | PROGRAMMING | 4000.0 | Tutorial | |
| 7546 | K-good | constructive algorithms games math number theory | Statement | D | CodeTON Round 1 (Div. 1 + Div. 2, Rated, Prizes!) {1656} | PROGRAMMING | 2000.0 | Tutorial | |
| 1174 | Gojou and Matrix Game | data structures dp games math number theory sortings | Statement | E | Codeforces Round 779 (Div. 2) {1658} | PROGRAMMING | 2500.0 | Codeforces Round #779 (Div. 2) Editorial | |
| 248 | Tree and Permutation Game | dfs and similar games trees | Statement | F | Codeforces Round 782 (Div. 2) {1659} | PROGRAMMING | 3000.0 | Codeforces Round #782 (Div. 2) Editorial | |
| 19900 | Deletive Editing | greedy | Statement | D | 2021-2022 ICPC, NERC, Northern Eurasia Onsite (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1666} | PROGRAMMING | Tutorial (PDF) | ||
| 16807 | Log Chopping | constructive algorithms games implementation math | Statement | A | Codeforces Global Round 20 {1672} | PROGRAMMING | 250.0 | Global Round 20 Editorial | 800 |
| 19132 | Subtle Substring Subtraction | games greedy strings | Statement | A | Codeforces Round 785 (Div. 2) {1673} | PROGRAMMING | 500.0 | Codeforces Round #785 (Div. 2) Editorial | |
| 21676 | Game with Cards | games greedy | Statement | A | Educational Codeforces Round 129 (Rated for Div. 2) {1681} | PROGRAMMING | 103163 | 800 | |
| 24922 | Digit Minimization | constructive algorithms games math | Statement | A | Codeforces Round 792 (Div. 1 + Div. 2) {1684} | PROGRAMMING | 500.0 | Codeforces Round #792 (Div. 1 + Div. 2) Editorial | 800 |
| 16785 | Subrectangle Guess | games | Statement | A | Codeforces Round 801 (Div. 2) and EPIC Institute of Technology Round {1695} | PROGRAMMING | 500.0 | Editorial for Codeforces Round #801 (Div. 2) and EPIC Institute of Technology Round | |
| 19950 | Circle Game | games | Statement | B | Codeforces Round 801 (Div. 2) and EPIC Institute of Technology Round {1695} | PROGRAMMING | 750.0 | Editorial for Codeforces Round #801 (Div. 2) and EPIC Institute of Technology Round | |
| 237 | Game of AI (easy version) | combinatorics fft math | Statement | H1 | CodeTON Round 2 (Div. 1 + Div. 2, Rated, Prizes!) {1704} | PROGRAMMING | 2250.0 | CodeTON Round 2 Editorial | |
| 110 | Game of AI (hard version) | combinatorics fft math | Statement | H2 | CodeTON Round 2 (Div. 1 + Div. 2, Rated, Prizes!) {1704} | PROGRAMMING | 2750.0 | CodeTON Round 2 Editorial | |
| 1299 | Colouring Game | constructive algorithms games | Statement | F | CodeTON Round 2 (Div. 1 + Div. 2, Rated, Prizes!) {1704} | PROGRAMMING | 2750.0 | CodeTON Round 2 Editorial | |
| 578 | Two Arrays | games graph matchings | Statement | E | Codeforces Round 810 (Div. 1) {1710} | PROGRAMMING | 2750.0 | Codeforces Round #810 Editorial | |
| 26788 | Chip Game | games math | Statement | A | Codeforces Round 814 (Div. 2) {1719} | PROGRAMMING | 500.0 | Codeforces Round #814 (Div. 1, Div. 2) Editorial | |
| 4356 | Moving Both Hands | dp graphs shortest paths | Statement | M | COMPFEST 14 - Preliminary Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1725} | PROGRAMMING | Tutorial | ||
| 8226 | Letter Picking | constructive algorithms dp games | Statement | D | Educational Codeforces Round 135 (Rated for Div. 2) {1728} | PROGRAMMING | 106805 | ||
| 8461 | Valiant's New Map | binary search brute force data structures dp two pointers | Statement | D | Codeforces Round 841 (Div. 2) and Divide by Zero 2022 {1731} | PROGRAMMING | 1500.0 | Codeforces Round #841 (Div. 2) and Divide By Zero 2022 Editorial | |
| 21059 | Rule of League | constructive algorithms math | Statement | B | Codeforces Round 821 (Div. 2) {1733} | PROGRAMMING | 1000.0 | Codeforces Round #821 (Div. 2) Editorial | |
| 6401 | Ela and Crickets | games implementation math | Statement | C | Dytechlab Cup 2022 {1737} | PROGRAMMING | 1500.0 | Editorial of Dytechlab Cup 2022 | |
| 12741 | Even Number Addicts | dp games greedy math | Statement | C | Codeforces Global Round 22 {1738} | PROGRAMMING | 1500.0 | Editorial of Codeforces Global Round <strong>22</strong> | |
| 10070 | Card Game | combinatorics constructive algorithms dp games | Statement | C | Educational Codeforces Round 136 (Rated for Div. 2) {1739} | PROGRAMMING | Educational Codeforces Round 136 Editorial | ||
| 12302 | Bricks and Bags | constructive algorithms games greedy sortings | Statement | C | Codeforces Round 831 (Div. 1 + Div. 2) {1740} | PROGRAMMING | 1500.0 | Tutorial | 1400 |
| 23460 | Swap Game | games | Statement | C | Codeforces Round 832 (Div. 2) {1747} | PROGRAMMING | 1250.0 | Codeforces Round #832 (Div. 2) Editorial | |
| 15682 | Number Game | games greedy implementation | Statement | C | Educational Codeforces Round 138 (Rated for Div. 2) {1749} | PROGRAMMING | 108269 | ||
| 9858 | Broken Keyboard | greedy | Statement | B | 2022-2023 ICPC, NERC, Southern and Volga Russian Regional Contest (Online Mirror, ICPC Rules, Preferably Teams) {1765} | PROGRAMMING | 109642 | 800 | |
| 11188 | Playoff | combinatorics constructive algorithms dp graphs greedy | Statement | D | Educational Codeforces Round 140 (Rated for Div. 2) {1767} | PROGRAMMING | 110225 | ||
| 4388 | Koxia and Game | data structures dfs and similar dsu games graph matchings graphs implementation | Statement | D | Good Bye 2022: 2023 is NEAR {1770} | PROGRAMMING | 1500.0 | Good Bye 2022 -- Editorial | |
| 1599 | Gaining Rating | binary search greedy math sortings | Statement | G | Codeforces Round 839 (Div. 3) {1772} | PROGRAMMING | 110313 | ||
| 7657 | Permutation Game | games | Statement | E | Codeforces Round 839 (Div. 3) {1772} | PROGRAMMING | 110313 | ||
| 577 | Interactive Factorial Guessing | brute force games implementation interactive | Statement | I | 2022-2023 ICPC, NERC, Northern Eurasia Onsite (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1773} | PROGRAMMING | 2500 | ||
| 892 | Spinach Pizza | games geometry greedy interactive | Statement | I | SWERC 2022-2023 - Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1776} | PROGRAMMING | |||
| 981 | Library game | games greedy interactive sortings | Statement | C | SWERC 2022-2023 - Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1776} | PROGRAMMING | |||
| 2025 | Anya's Simultaneous Exhibition | constructive algorithms data structures graphs greedy interactive sortings | Statement | E | Hello 2023 {1779} | PROGRAMMING | 2250.0 | ||
| 461 | Infinite Game | combinatorics dp games probabilities | Statement | E | VK Cup 2022 - Финальный раунд (Engine) {1784} | PROGRAMMING | 3000.0 | Codeforces Round #850 Editorial | |
| 964 | Serval and Music Game | brute force combinatorics implementation math number theory | Statement | E | Codeforces Round 853 (Div. 2) {1789} | PROGRAMMING | 2000.0 | Codeforces Round #853 (Div. 2) Editorial | |
| 29386 | Playing in a Casino | math sortings | Statement | B | Codeforces Round 861 (Div. 2) {1808} | PROGRAMMING | 1000.0 | Codeforces Round #861 (Div. 2) editorial | 1200 |
| 551 | Prediction | combinatorics data structures dp | Statement | G | Educational Codeforces Round 145 (Rated for Div. 2) {1809} | PROGRAMMING | 114300 | ||
| 1030 | Toy Machine | constructive algorithms games implementation | Statement | D | Codeforces Round 869 (Div. 1) {1817} | PROGRAMMING | 2000.0 | Codeforces Round #869 (Div.1, Div.2) Editorial | |
| 1733 | The Fox and the Complete Tree Traversal | constructive algorithms dp games implementation math trees | Statement | C | Codeforces Round 866 (Div. 1) {1819} | PROGRAMMING | 1500.0 | Codeforces Round #866 (Div.1, Div.2, based on Lipetsk Team Olympiad) Editorial | |
| 1441 | Removing Graph | games graphs math | Statement | E | Codeforces Round 868 (Div. 2) {1823} | PROGRAMMING | 2000.0 | 115465 | |
| 15001 | Game with Reversing | games strings | Statement | C | Codeforces Round 879 (Div. 2) {1834} | PROGRAMMING | 1250.0 | Codeforces Round #879 Editorial | |
| 2513 | Playoff Fixing | combinatorics trees | Statement | E | Educational Codeforces Round 149 (Rated for Div. 2) {1837} | PROGRAMMING | 116752 | ||
| 25970 | Game with Board | constructive algorithms games | Statement | A | Educational Codeforces Round 150 (Rated for Div. 2) {1841} | PROGRAMMING | 117262 | ||
| 4715 | Tenzing and His Animal Friends | brute force constructive algorithms graphs greedy shortest paths | Statement | D | CodeTON Round 5 (Div. 1 + Div. 2, Rated, Prizes!) {1842} | PROGRAMMING | 1500.0 | CodeTON Round 5 Editorial | |
| 20773 | Tenzing and Tsondu | games math | Statement | A | CodeTON Round 5 (Div. 1 + Div. 2, Rated, Prizes!) {1842} | PROGRAMMING | 250.0 | CodeTON Round 5 Editorial | |
| 25932 | Subtraction Game | constructive algorithms games math | Statement | A | Codeforces Round 884 (Div. 1 + Div. 2) {1844} | PROGRAMMING | 500.0 | Codeforces Round #884 (Div. 1 + Div. 2) Editorial | |
| 18379 | Vika and Her Friends | constructive algorithms games math | Statement | A | Codeforces Round 885 (Div. 2) {1848} | PROGRAMMING | 500.0 | Codeforces Round #885 (Div.2) Editorial | |
| 523 | Game Bundles | constructive algorithms | Statement | E | Codeforces Round 889 (Div. 1) {1854} | PROGRAMMING | 2750.0 | Editorial of Codeforces Round 889 (Div. 1 + Div. 2) | |
| 65597 | Buttons | games greedy math | Statement | A | Codeforces Round 893 (Div. 2) {1858} | PROGRAMMING | 500.0 | Codeforces Round #893 (Div. 2) Editorial | 800 |
| 15526 | Game on Permutation | data structures games greedy | Statement | C | Educational Codeforces Round 153 (Rated for Div. 2) {1860} | PROGRAMMING | Educational Codeforces Round 153 Editorial | ||
| 3035 | Guess Game | bitmasks combinatorics constructive algorithms data structures games math probabilities strings trees | Statement | E | Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) {1864} | PROGRAMMING | 2000.0 | Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) Editorial | |
| 924 | Imagination Castle | dp games two pointers | Statement | I | COMPFEST 15 - Preliminary Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1866} | PROGRAMMING | COMPFEST 15 Preliminary — Editorial | ||
| 12654 | Salyg1n and the MEX Game | constructive algorithms data structures games greedy interactive | Statement | C | Codeforces Round 897 (Div. 2) {1867} | PROGRAMMING | 1250.0 | ||
| 13594 | Fill in the Matrix | constructive algorithms implementation | Statement | A | Codeforces Round 896 (Div. 1) {1868} | PROGRAMMING | 500.0 | Codeforces Round 896 (Div. 1, Div. 2) Editorial | |
| 276 | Clubstep | binary search brute force data structures greedy trees | Statement | G | Codeforces Round 902 (Div. 1, based on COMPFEST 15 - Final Round) {1876} | PROGRAMMING | 3250.0 | Codeforces Round #902 (Div. 1, Div. 2, based on COMPFEST 15 — Final Round) Editorial | |
| 604 | Last Man Standing | data structures number theory | Statement | F | Educational Codeforces Round 155 (Rated for Div. 2) {1879} | PROGRAMMING | 120773 | 2800 | |
| 1854 | Infinite Card Game | brute force dfs and similar games graphs greedy sortings | Statement | E | Educational Codeforces Round 157 (Rated for Div. 2) {1895} | PROGRAMMING | Educational Codeforces Round 157 Editorial | ||
| 91639 | Game with Integers | games math number theory | Statement | A | Codeforces Round 909 (Div. 3) {1899} | PROGRAMMING | Разбор Codeforces Round 909 (Div. 3) | ||
| 895 | Babysitting | 2-sat binary search data structures graphs | Statement | F | Codeforces Round 912 (Div. 2) {1903} | PROGRAMMING | 3500.0 | Codeforces Round #912 (Div. 2) Editorial | |
| 2503 | Geo Game | constructive algorithms dp games greedy interactive math | Statement | E | Codeforces Round 912 (Div. 2) {1903} | PROGRAMMING | 2250.0 | Codeforces Round #912 (Div. 2) Editorial | |
| 331 | Grid Game 2 | games number theory | Statement | G | 2023-2024 ICPC, Asia Jakarta Regional Contest (Online Mirror, Unrated, ICPC Rules, Teams Preferred) {1906} | PROGRAMMING | problem_analysis.pdf | ||
| 37736 | Three Activities | brute force dp implementation sortings | Statement | D | Codeforces Round 916 (Div. 3) {1914} | PROGRAMMING | Codeforces Round 916 (Div. 3) Editorial | ||
| 14204 | Game with Marbles (Easy Version) | brute force games greedy sortings | Statement | E1 | Codeforces Round 916 (Div. 3) {1914} | PROGRAMMING | Codeforces Round 916 (Div. 3) Editorial | ||
| 14707 | Game with Marbles (Hard Version) | games greedy sortings | Statement | E2 | Codeforces Round 916 (Div. 3) {1914} | PROGRAMMING | Codeforces Round 916 (Div. 3) Editorial | ||
| 19841 | Training Before the Olympiad | constructive algorithms games implementation math | Statement | C | Good Bye 2023 {1916} | PROGRAMMING | 1250.0 | ||
| 208 | Tree LGM | constructive algorithms games trees | Statement | G | Hello 2024 {1919} | PROGRAMMING | 4000.0 | 3500 | |
| 36137 | Wallet Exchange | games math | Statement | A | Hello 2024 {1919} | PROGRAMMING | 250.0 | 800 | |
| 23083 | Summation Game | dp games greedy sortings | Statement | B | Codeforces Round 919 (Div. 2) {1920} | PROGRAMMING | 1000.0 | Editorial for Codeforces Round #919 (Div. 2) | |
| 11378 | Eat the Chip | brute force games greedy | Statement | E | Codeforces Round 920 (Div. 3) {1921} | PROGRAMMING | Editorial for Codeforces Round 920 (Div. 3) | ||
| 17241 | Sasha and the Casino | binary search brute force dp games greedy math | Statement | C | Codeforces Round 926 (Div. 2) {1929} | PROGRAMMING | 1500.0 | Codeforces Round #926 (Div. 2) Editorial. | |
| 25527 | Anna and the Valentine's Day Gift | games greedy math sortings | Statement | E | Codeforces Round 925 (Div. 3) {1931} | PROGRAMMING | 125878 | ||
| 1748 | XOR Break --- Game Version | bitmasks games greedy interactive | Statement | D2 | Codeforces Round 931 (Div. 2) {1934} | PROGRAMMING | 1250.0 | Tutorial | |
| 110 | Big Persimmon | *special dp games | Statement | D | XVIII Open Olympiad in Informatics - Final Stage, Day 1 (Unrated, Online Mirror, IOI rules) {1939} | PROGRAMMING | |||
| 1955 | Farm Game | combinatorics games math | Statement | E | CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!) {1942} | PROGRAMMING | 2500.0 | CodeTON Round 8 Editorial | |
| 21422 | MEX Game 1 | brute force games greedy | Statement | A | Codeforces Round 934 (Div. 1) {1943} | PROGRAMMING | 500.0 | Codeforces Round #934 (Div1, Div2) Editorial | |
| 357 | Thanos Snap | dp games greedy trees | Statement | H | Codeforces Global Round 25 {1951} | PROGRAMMING | 3500.0 | Codeforces Global Round 25 Editorial | |
| 899 | Help, what does it mean to be "Based" | brute force combinatorics constructive algorithms games implementation sortings | Statement | J | April Fools Day Contest 2024 {1952} | PROGRAMMING | April Fools Day Contest 2024 Editorial | ||
| 340 | Sweep Line | combinatorics games math | Statement | E | April Fools Day Contest 2024 {1952} | PROGRAMMING | April Fools Day Contest 2024 Editorial | ||
| 8686 | Unfair Game | dp games greedy math | Statement | F | Codeforces Round 938 (Div. 3) {1955} | PROGRAMMING | 128243 | ||
| 22892 | Nene and the Card Game | games greedy | Statement | B | Codeforces Round 939 (Div. 2) {1956} | PROGRAMMING | 750.0 | [Editorial] Codeforces Round 939 (Div. 2) | |
| 16651 | Everything Nim | games greedy math sortings | Statement | A | Codeforces Round 941 (Div. 1) {1965} | PROGRAMMING | 500.0 | Codeforces Round #941 (Div. 1, Div. 2) Editorial | 1400 |
| 461 | Connected Cubes | constructive algorithms games | Statement | E | Codeforces Round 941 (Div. 1) {1965} | PROGRAMMING | 2500.0 | Codeforces Round #941 (Div. 1, Div. 2) Editorial | 3100 |
| 19544 | Card Exchange | constructive algorithms games greedy | Statement | A | Codeforces Round 941 (Div. 2) {1966} | PROGRAMMING | 500.0 | Codeforces Round #941 (Div. 1, Div. 2) Editorial | 800 |
| 17364 | Permutation Game | brute force dfs and similar games graphs greedy math | Statement | D | Codeforces Round 943 (Div. 3) {1968} | PROGRAMMING | 129096 | 1300 | |
| 4997 | Game on Tree (Easy) | games | Statement | C1 | Helvetic Coding Contest 2024 online mirror (teams allowed, unrated) {1970} | PROGRAMMING | Helvetic Coding Contest 2024 Editorial | 1400 | |
| 4314 | Game on Tree (Medium) | dfs and similar dp games trees | Statement | C2 | Helvetic Coding Contest 2024 online mirror (teams allowed, unrated) {1970} | PROGRAMMING | Helvetic Coding Contest 2024 Editorial | 1700 | |
| 2412 | Game on Tree (Hard) | dfs and similar dp games trees | Statement | C3 | Helvetic Coding Contest 2024 online mirror (teams allowed, unrated) {1970} | PROGRAMMING | Helvetic Coding Contest 2024 Editorial | 1900 | |
| 25331 | Coin Games | games | Statement | B | Codeforces Round 942 (Div. 2) {1972} | PROGRAMMING | 750.0 | Tutorial | 900 |
| 28470 | Chess For Three | brute force dp implementation math | Statement | A | Codeforces Round 945 (Div. 2) {1973} | PROGRAMMING | 500.0 | Editorial for Codeforces Round #945 (Div. 2) | 900 |
| 8674 | World is Mine | dp games greedy | Statement | D | EPIC Institute of Technology Round Summer 2024 (Div. 1 + Div. 2) {1987} | PROGRAMMING | 1500.0 | EPIC Institute of Technology Round Summer 2024 (Div. 1 + Div. 2) Editorial | |
| 26792 | Submission Bait | brute force games greedy sortings | Statement | A | Codeforces Round 960 (Div. 2) {1990} | PROGRAMMING | 500.0 | Video Tutorial | |
| 5101 | Coloring Game | constructive algorithms games graphs greedy interactive | Statement | E | Pinely Round 4 (Div. 1 + Div. 2) {1991} | PROGRAMMING | 2000.0 | Video Tutorial | |
| 171 | Grid Game | constructive algorithms games greedy interactive | Statement | I | Pinely Round 4 (Div. 1 + Div. 2) {1991} | PROGRAMMING | 4000.0 | Video Tutorial | |
| 559 | Prime Split Game | fft games math number theory | Statement | H | Pinely Round 4 (Div. 1 + Div. 2) {1991} | PROGRAMMING | 3500.0 | Video Tutorial | |
| 13479 | Hungry Games | binary search data structures dp two pointers | Statement | C | Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2) {1994} | PROGRAMMING | 1250.0 | Video Tutorial | |
| 41519 | Card Game | brute force implementation | Statement | B | Codeforces Round 964 (Div. 4) {1999} | PROGRAMMING | Video Tutorial | ||
| 22945 | Removals Game | constructive algorithms games | Statement | B | EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) {2002} | PROGRAMMING | 750.0 | EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) Editorial | |
| 27477 | Turtle and Piggy Are Playing a Game 2 | games greedy sortings | Statement | B | Codeforces Round 968 (Div. 2) {2003} | PROGRAMMING | 750.0 | sol-zh.pdf | |
| 26937 | Splitting Items | games greedy sortings | Statement | C | Educational Codeforces Round 169 (Rated for Div. 2) {2004} | PROGRAMMING | Educational Codeforces Round 169 Editorial | ||
| 5045 | Not a Nim Problem | games math number theory | Statement | E | Educational Codeforces Round 169 (Rated for Div. 2) {2004} | PROGRAMMING | Educational Codeforces Round 169 Editorial | ||
| 3314 | Subtangle Game (Easy Version) | dp games greedy implementation | Statement | E1 | Codeforces Round 972 (Div. 2) {2005} | PROGRAMMING | 1500.0 | Discussion stream (With Hints) | |
| 1056 | Subtangle Game (Hard Version) | dp games greedy implementation | Statement | E2 | Codeforces Round 972 (Div. 2) {2005} | PROGRAMMING | 2000.0 | Discussion stream (With Hints) | |
| 9292 | Iris and Game on the Tree | games graphs greedy trees | Statement | A | Codeforces Round 969 (Div. 1) {2006} | PROGRAMMING | 750.0 | Tutorial | |
| 650 | Game in Tree (Easy Version) | binary search data structures games implementation trees | Statement | F1 | Codeforces Round 973 (Div. 2) {2013} | PROGRAMMING | 2000.0 | 134298 | |
| 5607 | Robin Hood Archery | data structures games greedy hashing | Statement | H | Codeforces Round 974 (Div. 3) {2014} | PROGRAMMING | Discussion stream (With Hints) | ||
| 325 | Speedbreaker Counting (Easy Version) | combinatorics dp games greedy implementation math | Statement | F1 | Codeforces Round 975 (Div. 1) {2018} | PROGRAMMING | 1500.0 | Editorial of Codeforces Round 975 (Div. 1, Div. 2) | |
| 597 | Many Games | brute force dp math | Statement | D | Codeforces Round 980 (Div. 1) {2023} | PROGRAMMING | 2250.0 | 135341 | |
| 247 | Bit Game (Easy Version) | bitmasks brute force games math | Statement | E1 | Codeforces Round 982 (Div. 2) {2027} | PROGRAMMING | 2000.0 | Codeforces Round #982 (Div. 2) Editorial | |
| 109 | Bit Game (Hard Version) | bitmasks dp math | Statement | E2 | Codeforces Round 982 (Div. 2) {2027} | PROGRAMMING | 1000.0 | Codeforces Round #982 (Div. 2) Editorial | |
| 11692 | Replacement | games greedy strings | Statement | B | Refact.ai Match 1 (Codeforces Round 985) {2029} | PROGRAMMING | 1250.0 | Refact.ai Match 1 (Codeforces Round 985) Editorial | |
| 19765 | A TRUE Battle | brute force games greedy | Statement | C | Codeforces Round 979 (Div. 2) {2030} | PROGRAMMING | 1000.0 | Codeforces Round 979 Editorial | |
| 479 | Peanuts | combinatorics dp games math | Statement | F | Codeforces Round 983 (Div. 2) {2032} | PROGRAMMING | 3000.0 | Codeforces Round 983 (Div. 2) Editorial | |
| 41063 | Sakurako and Kosuke | constructive algorithms math | Statement | A | Codeforces Round 981 (Div. 3) {2033} | PROGRAMMING | 135520 | ||
| 5406 | Bonus Project | games greedy | Statement | A | 2024-2025 ICPC, NERC, Southern and Volga Russian Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2038} | PROGRAMMING | 1400 | ||
| 24402 | Game of Division | brute force games math | Statement | A | Codeforces Round 992 (Div. 2) {2040} | PROGRAMMING | 500.0 | Codeforces Round #992 (Div.2) Editorial | |
| 19441 | Game with Colored Marbles | games greedy | Statement | B | Educational Codeforces Round 172 (Rated for Div. 2) {2042} | PROGRAMMING | 136886 | ||
| 900 | Nim | bitmasks dp games | Statement | F | Educational Codeforces Round 173 (Rated for Div. 2) {2043} | PROGRAMMING | Educational Codeforces Round 173 Editorial | ||
| 154 | Grid Game 3-angle | games math | Statement | F | 2024-2025 ICPC Asia Jakarta Regional Contest (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2045} | PROGRAMMING | raRzKDJLPHcUnqTcwvGznwEdKiDWjEkd.pdf | 3000 | |
| 4503 | Resourceful Caterpillar Sequence | dfs and similar dp games graphs implementation trees | Statement | E | Good Bye 2024: 2025 is NEAR {2053} | PROGRAMMING | 2000.0 | Good Bye 2024: 2025 is NEAR Editorial | |
| 33516 | Two Frogs | constructive algorithms games greedy | Statement | A | Codeforces Round 996 (Div. 2) {2055} | PROGRAMMING | 500.0 | Codeforces Round 996 (Div. 2) Editorial | |
| 31980 | Game of Mathletes | games greedy sortings two pointers | Statement | C | Codeforces Round 998 (Div. 3) {2060} | PROGRAMMING | Codeforces Round 998 (Div. 3) Editorial | ||
| 444 | The Game (Hard Version) | data structures dfs and similar games graphs trees | Statement | E2 | Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) {2062} | PROGRAMMING | 2500.0 | Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) Editorial | |
| 4313 | The Game (Easy Version) | dfs and similar games graphs trees | Statement | E1 | Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) {2062} | PROGRAMMING | 1500.0 | Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) Editorial | |
| 1834 | Game with Binary String | data structures divide and conquer games greedy math | Statement | E | Educational Codeforces Round 175 (Rated for Div. 2) {2070} | PROGRAMMING | Video Tutorial | ||
| 37 | Alice, Bob, And Two Arrays | *special data structures dp games | Statement | A | XIX Open Olympiad in Informatics - Final Stage, Day 1 (Unrated, Online Mirror, IOI rules) {2079} | PROGRAMMING | |||
| 725 | Wish Upon a Satellite (Easy Version) | dp games greedy | Statement | G1 | Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2) {2084} | PROGRAMMING | 2500.0 | 141155 | |
| 5981 | Plinko | *special games interactive | Statement | B | April Fools Day Contest 2025 {2095} | PROGRAMMING | April Fools Day Contest 2025 Editorial | ||
| 17271 | Card Game | brute force games greedy math | Statement | C | Educational Codeforces Round 178 (Rated for Div. 2) {2104} | PROGRAMMING | Educational Codeforces Round 178 Editorial | ||
| 19652 | Apples in Boxes | games greedy math | Statement | B | Codeforces Round 1023 (Div. 2) {2107} | PROGRAMMING | 750.0 | Codeforces Round 1023 (Div 2) Editorial | |
| 1050 | Gellyfish and Forget-Me-Not | bitmasks games math | Statement | D | Codeforces Round 1028 (Div. 1) {2115} | PROGRAMMING | 2250.0 | Codeforces Round 1028 (Div.1, Div.2) Editorial | |
| 21739 | Binary String Battle | constructive algorithms games greedy | Statement | D | Codeforces Round 1034 (Div. 3) {2123} | PROGRAMMING | Codeforces Round 1034 (Div. 3) Editorial | ||
| 13444 | Hamiiid, Haaamid... Hamid? | games greedy | Statement | B | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} | PROGRAMMING | 1000.0 | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial | |
| 12309 | Trip Shopping | games greedy sortings | Statement | C | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} | PROGRAMMING | 1500.0 | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial | |
| 1916 | Cry Me a River | dfs and similar dp games graphs | Statement | G | Codeforces Round 1047 (Div. 3) {2137} | PROGRAMMING | Codeforces Round 1047 (Div. 3) Editorial | ||
| 12292 | Ultimate Value | data structures games greedy | Statement | C | Codeforces Round 1049 (Div. 2) {2140} | PROGRAMMING | 1250.0 | Codeforces Round 1049 (Div. 2) Editorial | |
| 1411 | Games | *special greedy | Statement | B | Kotlin Heroes: Episode 13 {2141} | PROGRAMMING | Kotlin Heroes 13 Editorial | ||
| 7430 | Game on Array | games greedy | Statement | D | Codeforces Global Round 29 (Div. 1 + Div. 2) {2147} | PROGRAMMING | 2000.0 | ||
| 6703 | Division Versus Addition | bitmasks data structures games | Statement | D | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) {2152} | PROGRAMMING | 2500.0 | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) Editorial | |
| 12783 | Catching the Krug | games math | Statement | B | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) {2152} | PROGRAMMING | 1500.0 | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) Editorial | |
| 2807 | Mimo & Yuyu | games greedy math | Statement | E | Codeforces Round 1056 (Div. 2) {2155} | PROGRAMMING | 2250.0 | Codeforces Round 1056 (Div. 2) Editorial | |
| 951 | Best Time to Buy and Sell Stock | binary search data structures games greedy | Statement | E | Codeforces Round 1061 (Div. 2) {2156} | PROGRAMMING | 2750.0 | Codeforces Round 1061 (Div. 2) Editorial | |
| 153 | Hyper Smawk Bros | dp dp games | Statement | I | Codeforces Round 1066 (Div. 1 + Div. 2) {2157} | PROGRAMMING | 4000.0 | Codeforces Round 1066 (Div. 1 + Div. 2) Editorial | |
| 10919 | Annoying Game | dp games greedy | Statement | C | Codeforces Round 1067 (Div. 2) {2158} | PROGRAMMING | 1500.0 | Codeforces Round 1067 (Div. 2) Editorial | |
| 15653 | Round Trip | games greedy implementation math | Statement | A | Pinely Round 5 (Div. 1 + Div. 2) {2161} | PROGRAMMING | 500.0 | ||
| 11720 | Renako Amaori and XOR Game (hard version) | bitmasks games greedy | Statement | C2 | Codeforces Round 1065 (Div. 3) {2171} | PROGRAMMING | Codeforces Round 1065 (Div. 3) Editorial | ||
| 19074 | Renako Amaori and XOR Game (easy version) | games greedy | Statement | C1 | Codeforces Round 1065 (Div. 3) {2171} | PROGRAMMING | Codeforces Round 1065 (Div. 3) Editorial | ||
| 98 | Divisor Card Game | Statement | D | 2025 ICPC Asia Taichung Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2172} | PROGRAMMING | ||||
| 297 | Shuffling Cards with Problem Solver 68! | string suffix structures | Statement | H | 2025 ICPC Asia Taichung Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2172} | PROGRAMMING | |||
| 92 | Game of Scientists (Version 2) | brute force chinese remainder theorem interactive math | Statement | E2 | Codeforces Round 1069 (Div. 1) {2174} | PROGRAMMING | 1750.0 | Codeforces Round 1069 Editorial | |
| 126 | Game of Scientists (Version 1) | chinese remainder theorem interactive math | Statement | E1 | Codeforces Round 1069 (Div. 1) {2174} | PROGRAMMING | 1750.0 | Codeforces Round 1069 Editorial | |
| 118 | Bug Is Feature (Unconditional Version) | games | Statement | H1 | Codeforces Global Round 31 (Div. 1 + Div. 2) {2180} | PROGRAMMING | 3000.0 | Codeforces Global Round 31 | |
| 103 | Bug Is Feature (Conditional Version) | games | Statement | H2 | Codeforces Global Round 31 (Div. 1 + Div. 2) {2180} | PROGRAMMING | 3000.0 | Codeforces Global Round 31 | |
| 628 | Greta's Game | binary search dp math | Statement | G | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 5554 | Battle of Arrays | brute force data structures games greedy | Statement | B | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 3456 | Fragmented Nim | games | Statement | F | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 23558 | Binary Array Game | games | Statement | A | Hello 2026 {2183} | PROGRAMMING | 500.0 | ||
| 9343 | Unfair Game | combinatorics dp math | Statement | D | Codeforces Round 1072 (Div. 3) {2184} | PROGRAMMING | Codeforces Round 1072 (Div. 3) Editorial | ||
| 1332 | Jerry and Tom | data structures dfs and similar games graphs greedy trees | Statement | C | Codeforces Round 1077 (Div. 1) {2187} | PROGRAMMING | 1750.0 | Codeforces Round 1077 (Div. 1, Div. 2) Editorial | |
| 3143 | Sub-RBS (Hard Version) | combinatorics dp games implementation matrices strings | Statement | B2 | Codeforces Round 1073 (Div. 1) {2190} | PROGRAMMING | 750.0 | Codeforces Round 1073 (Div. 1, Div. 2) Editorial | |
| 16899 | Sorting Game | games greedy | Statement | A | Codeforces Round 1073 (Div. 1) {2190} | PROGRAMMING | 500.0 | Codeforces Round 1073 (Div. 1, Div. 2) Editorial | |
| 10752 | All-in-one Gun | binary search greedy math | Statement | C | Codeforces Round 1081 (Div. 2) {2192} | PROGRAMMING | 1250.0 | Codeforces Round 1081 (Div. 2) Editorial | |
| 15496 | Game with a Fraction | games math | Statement | A | Codeforces Round 1079 (Div. 1) {2196} | PROGRAMMING | 500.0 | Tutorial | |
| 7686 | Divisive Battle | games greedy math number theory | Statement | E | Codeforces Round 1084 (Div. 3) {2200} | PROGRAMMING | Codeforces Round 1084 (Div. 3) Editorial | ||
| 5237 | Divisibility Game | brute force games greedy number theory | Statement | D | Educational Codeforces Round 187 (Rated for Div. 2) {2203} | PROGRAMMING | Educational Codeforces Round 187 Editorial | ||
| 302 | Subtree Removal Game | games | Statement | B | 2026 ICPC Asia Pacific Championship - Online Mirror (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2206} | PROGRAMMING | Tutorial (PDF) | ||
| 2041 | Boxed Like a Fish | dfs and similar dp games trees | Statement | D | Codeforces Round 1085 (Div. 1 + Div. 2) {2207} | PROGRAMMING | 2250.0 | Codeforces Round 1085 (Div. 1 + Div. 2) Editorial | |
| 5550 | One Night At Freddy's | games greedy sortings | Statement | B | Codeforces Round 1085 (Div. 1 + Div. 2) {2207} | PROGRAMMING | 1250.0 | Codeforces Round 1085 (Div. 1 + Div. 2) Editorial | |
| 13216 | Cyclists | games greedy implementation sortings | Statement | B | Codeforces Round 1086 (Div. 2) {2208} | PROGRAMMING | 1000.0 | Tutorial | |
| 3478 | Special Problem | *special brute force games | Statement | J | April Fools Day Contest 2026 {2214} | PROGRAMMING | |||
| 18 | Research | games | Statement | F | Codeforces Round 1092 (Unrated, Div. 1, Based on THUPC 2026 — Finals) {2215} | PROGRAMMING | 4000.0 | ||
| 589 | Interval Game | bitmasks combinatorics dp games greedy math probabilities | Statement | F | Codeforces Round 1091 (Div. 2) and CodeCraft 26 {2217} | PROGRAMMING | 2750.0 | ||
| 31369 | The 67th Integer Problem | brute force games implementation math | Statement | A | Codeforces Round 1090 (Div. 4) {2218} | PROGRAMMING |