05-28 Codeforces #562 (Div. 1) A. Increasing by Modulo(二分,贪心) 05-28 莫比乌斯反演入门题 05-27 2019 东北四省赛部分题解 The 13th Chinese Northeast Collegiate Programming Contest 05-26 Educational Codeforces 57 (Rated for Div. 2) C. Polygon for the Angle (正多边形角度,gcd) 05-26 Codeforces #530 (Div. 1) A. Sum in the tree(递推 贪心) 05-25 Educational Codeforces 58 (Rated for Div. 2) C. Division and Union (排序,二分) 05-25 Codeforces #539 (Div. 1) A. Sasha and a Bit of Relax (异或 前缀和) 05-25 Comet OJ - Contest #4 奇偶性 05-24 CodeCraft-19 and Codeforces #537 (Div. 2) B. Average Superhero Gang Power(枚举,贪心) 05-24 Codeforces #538 (Div. 2) C. Trailing Loves (唯一分解定理) 05-24 Codeforces Global #2 D. Frets On Fire (二分,前缀和) 05-24 [转]codeforces 1129 A2. Toy Train【贪心】 05-24 Codeforces #541 (Div. 2) F. Asya And Kittens (并查集+DFS) 05-24 Educational Codeforces #61 (Div. 2) C. Painting the Fence (前缀和) 05-23 Codeforces #544 (Div. 3) F1. Spanning Tree with Maximum Degree (kruskal 05-23 Codeforces #545 (Div. 1) B. Camp Schedule (next数组求最小循环节)