一、思维 + 概率 / 期望
| 题目 | 名称 |
|---|---|
| CF280C | Game on Tree |
| CF1559E | Mocha and Stars |
| CF1174E | Ehab and the Expected GCD Problem |
| CF1753C | Wish I Knew How to Sort |
| CF1139D | Steps to One |
| CF1106F | Lunar New Year and a Recursive Sequence |
| CF1096E | The Top Scorer |
| CF1536F | Omkar and Akmar |
| CF1799G | Count Voting |
二、数据结构优化 / DS
| 题目 | 名称 |
|---|---|
| CF484E | Sign on Fence |
| CF1004F | Sonya and Bitwise OR |
| CF765F | Souvenirs |
| CF1422F | Boring Queries |
| CF1149C | Tree Generator™ |
| CF280D | k-Maximum Subsequence Sum |
| CF809D | Hitchhiking in the Baltic States |
| CF1034D | Intervals of Intervals |
| CF997E | Good Subsegments |
三、图论 / 树 / 连通性
| 题目 | 名称 |
|---|---|
| CF1830C | Hyperregular Bracket Strings |
| CF1626E | Black and White Tree |
| CF1555F | Good Graph |
| CF1270G | Subset with Zero Sum |
| CF1458D | Flip and Reverse |
| CF1120D | Power Tree |
| CF1242C | Sum Balance |
| CF1687C | Sanae and Giant Robot |
| CF1788F | XOR, Tree, and Queries |
| CF1605D | Treelabeling |
| CF1292C | Xenon's Attack on the Gangs |
| CF1394D | Boboniu and Jianghu |
四、数学 / 数论 / 组合
| 题目 | 名称 |
|---|---|
| CF1334E | Divisor Paths |
| CF1768E | Partial Sorting |
| CF1726E | Almost Perfect |
| CF468C | Hack it! |
| CF1237E | Balanced Binary Search Trees |
| CF364D | Ghd |
| CF913F | Strongly Connected Tournament |
| CF1408G | Clusterization Counting |
| CF1792F2 | Graph Coloring (hard version) |
| CF1988F | Heartbeat |
五、DP / 状态优化
| 题目 | 名称 |
|---|---|
| CF1453F | Even Harder |
| CF1730F | Almost Sorted |
| CF1634F | Fibonacci Additions |
| CF1750F | Majority |
| CF53E | Dead Ends |
| CF387D | George and Interesting Graph |
| CF1783F | Double Sort II |
| CF1632E2 | Distance Tree (hard version) |
| CF1485E | Move and Swap |
| CF1542E2 | Abnormal Permutation Pairs (hard version) |
| CF1662C | European Trip |
| CF1327F | AND Segments |
| CF1179D | Fedor Runs for President |
| CF573D | Bear and Cavalry |
六、交互 / 构造 / 有趣性质
| 题目 | 名称 |
|---|---|
| CF1830E | Bully Sort |
| CF1848F | Vika and Wiki |
| CF1805F1 | Survival of the Weakest (easy version) |
| CF1458C | Latin Square |
| CF1765A | Access Levels |
| CF1804F | Approximate Diameter |
| CF1511G | Chips on a Board |
| CF932G | Palindrome Partition |
| CF1625E2 | Cats on the Upgrade (hard version) |
| CF1830D | Mex Tree |
| CF1919F2 | Wine Factory (Hard Version) |
| CF1842G | Tenzing and Random Operations |
| CF1753D | The Beach |
| CF1776I | Spinach Pizza |
| CF414C | Mashmokh and Reverse Operation |
| CF1758E | Tick, Tock |
| CF1725L | Lemper Cooking Competition |
| CF1767E | Algebra Flash |
| CF1762F | Good Pairs |
| CF1725K | Kingdom of Criticism |
| CF863F | Almost Permutation |
| CF1016F | Road Projects |
| CF1681E | Labyrinth Adventures |
| CF702F | T-Shirts |
| CF453E | Little Pony and Lord Tirek |
| CF1428F | Fruit Sequences |
| CF549G | Happy Line |
| CF798D | Mike and distribution |
| CF802O | April Fools' Problem (hard) |
| CF1485F | Copy or Prefix Sum |
| CF1773G | Game of Questions |
| CF1765F | Chemistry Lab |
| CF1781F | Bracket Insertion |
| CF553E | Kyoya and Train |
| CF1765C | Card Guessing |
| CF1895G | Two Characters, Two Colors |
| CF1654F | Minimal String Xoration |
| CF1764G3 | Doremy's Perfect DS Class (Hard Version) |
| CF1009G | Allowed Letters |
| CF1945H | GCD is Greater |
| CF1909F2 | Small Permutation Problem (Hard Version) |
| CF21D | Traveling Graph |
| CF1383F | Special Edges |
| CF1789F | Serval and Brain Power |
| CF1942F | Farmer John's Favorite Function |
| CF1038E | Maximum Matching |
七、未分类但高质量
| 题目 | 名称 |
|---|---|
| CF1574F | Occurrences |
| CF587F | Duff is Mad |
| CF1292D | Chaotic V. |
| CF1801F | Another n-dimensional chocolate bar |
| CF1567F | One-Four Overload |
| CF1163F | Indecisive Taxi Fee |
| CF1842F | Tenzing and Tree |
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