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全部文章（共613篇）

C. Restoring Permutation

链接：https://codeforces.ml/contest/1315/problem/C You are given a sequence b1,b2,…,bnb1,b2,…,bn. Find the lexicographically minimal permutation a1,a2,…...

2020-09-15

0 466

D. Three Integers

链接：https://codeforces.ml/contest/1311/problem/D You are given three integers a≤b≤ca≤b≤c. In one move, you can add +1+1&nbs***bsp;−1−1 to any of ...

2020-09-15

0 353

B. Nick and Array

链接：https://codeforces.ml/contest/1180/problem/B Nick had received an awesome array of integers a=[a1,a2,…,an]a=[a1,a2,…,an] as a gift for his 55 birt...

2020-09-15

0 592

浅谈中国剩余定理

写这个类型博客的目的就是想总结一下某个专题的知识点，方便以后比赛前复习，由于太菜，如有错误，还请斧正。中国剩余定理又称孙子定理，简单来说是解决两两互质同余问题的最小非负整数解在模下的解是唯一的，解为其中，而为模的逆元。 void exgcd(int a,int b...

2020-09-15

0 444

C. Playlist

链接：https://codeforces.ml/contest/1140/problem/C You have a playlist consisting of nn songs. The ii-th song is characterized by two numbers titi and b...

2020-09-15

0 599

D. Minimum Triangulation

链接：https://codeforces.ml/contest/1140/problem/D You are given a regular polygon with nn vertices labeled from 11 to nn in counter-clockwise order. Th...

2020-09-15

0 497

E1. String Coloring (easy version)

链接：https://codeforces.ml/contest/1296/problem/E1 This is an easy version of the problem. The actual problems are different, but the easy version is a...

2020-09-15

0 424

E2. String Coloring (hard version)

链接：https://codeforces.ml/contest/1296/problem/E2 This is a hard version of the problem. The actual problems are different, but the easy version is al...

2020-09-15

0 510

C 矩阵消除游戏

链接：https://ac.nowcoder.com/acm/contest/4090/C 牛妹在玩一个名为矩阵消除的游戏，矩阵的大小是{n}n行{m}m列，第{i}i行第{j}j列的单元格的权值为a_{i,j}ai,j，牛妹可以进行{k}k个回合的游戏，在每个回合，牛妹可以选择一行或者选择一列...

2020-09-15

0 951

B. Journey Planning

链接：https://codeforces.ml/contest/1321/problem/B Tanya wants to go on a journey across the cities of Berland. There are nn cities situated along the m...

2020-09-15

0 362