Codeforces round #563
A-Ehab Fails to Be Thanos 给出2n个数，输出前n个数的和不等于后n个数的和 …
Codeforces Round #557 (Div. 2) D – Chladni Figure(分解素因子)
https://codeforces.com/contest/1162/problem/D 题意 …
Codeforces Round #557 (Div. 2) C – Hide and Seek
https://codeforces.com/contest/1162/problem/C 题意 小 …
Codeforces Round #557 (Div. 2) B – Double Matrix
题意 给两个相同大小的矩阵，对应位置可以交换 问是否能达到这样的状态 两个矩阵中从左到右严格递增，从 …
Codeforces Round #557 (Div. 2) A – Zoning Restrictions Again
总结 前三次光速A过 第四题忘记了x,y的无序性，导致WA 第五题尼姆博弈变型，不太会 第六题没看 …
Codeforces Round #523 (Div. 2) D – TV Shows
D. TV Shows time limit per test 2 seconds memory l …
Codeforces Round #523 (Div. 2) C-Multiplicity
C. Multiplicity time limit per test 3 seconds memo …
Codeforces Round #523 (Div. 2) B-Views Matter
B. Views Matter time limit per test 2 secon …
Codeforces Round #523 (Div. 2) A – Coins
A. Coins time limit per test 2 seconds memory limi …
#522 （Div. 2）—D. Barcelonian Distance
D. Barcelonian Distance time limit per test 1 seco …