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全部文章（共613篇）

E. Tree Shuffling

链接：https://codeforces.ml/contest/1363/problem/E Ashish has a tree consisting of nn nodes numbered 11 to nn rooted at node 11. The ii-th node in the t...

2020-09-15

0 534

C. A Cookie for You

链接：https://codeforces.ml/contest/1371/problem/C Anna is a girl so brave that she is loved by everyone in the city and citizens love her cookies. She ...

2020-09-15

0 557

D. Grid-00100

链接：https://codeforces.ml/contest/1371/problem/D A mad scientist Dr.Jubal has made a competitive programming task. Try to solve it! You are given int...

2020-09-15

0 534

D. Zero Remainder Array

链接：https://codeforces.com/contest/1374/problem/D You are given an array aa consisting of nn positive integers. Initially, you have an integer x=0x=0...

2020-09-15

0 0

C. Pluses and Minuses

链接：https://codeforces.ml/contest/1373/problem/C You are given a string ss consisting only of characters + and -. You perform some process with this s...

2020-09-15

0 654

D - Vacation

链接：https://vjudge.net/contest/381756#problem/D Tom and Jerry are going on a vacation. They are now driving on a one-way road and several cars are in ...

2020-09-15

0 543

网络流最大流模板

#include<bits/stdc++.h> using namespace std; typedef long long ll; const int N=200000+10,M=1e4+5,mod=1e9+7; ll n,m,s,t,h[N],cur[N],cnt=1,vis[N];...

2020-09-15

0 429

地震逃生

链接：https://www.luogu.com.cn/problem/P1343 题目描述汶川地震发生时，四川**中学正在上课，一看地震发生，老师们立刻带领x名学生逃跑，整个学校可以抽象地看成一个有向图，图中有n个点，m条边。1号点为教室，n号点为安全地带，每条边都只能容纳一定量的学生，超过...

2020-09-15

0 576

P1345 [USACO5.4]奶牛的电信Telecowmunication

链接：https://www.luogu.com.cn/problem/P1345 题目描述农夫约翰的奶牛们喜欢通过电邮保持联系，于是她们建立了一个奶牛电脑网络，以便互相交流。这些机器用如下的方式发送电邮：如果存在一个由 cc 台电脑组成的序列a_1,a_2,\cdots ,a_ca1,a2...

2020-09-15

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E. Maximum Subsequence Value

链接：https://codeforces.ml/contest/1365/problem/E Ridhiman challenged Ashish to find the maximum valued subsequence of an array aa of size nn consistin...

2020-09-15

0 487