水题. #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> using namespace std; ][]; int n,m,ans; int main() { scanf("%d%d",&n,&m); ;i<=n;i++) ;j<=*m;j++) scanf("%d",&a[i][j]);…

题目链接: http://codeforces.com/problemset/problem/595/A 题意: 一栋楼,有n层,每层有m户,每户有2个窗户,问这栋楼还有多少户没有睡觉(只要一个窗户灯亮就代表这户没有睡觉),1表示灯亮,0表示熄灭 解题思路: 其实就是每户的两个窗户的灯的状态时行逻辑或就可以了,因为只有0 0的时候,这户才代表睡觉了 程序代序: #include <cstdio> #include <cstring> #include <cmath> #…

A. Vitaly and Strings time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Vitaly is a diligent student who never missed a lesson in his five years of studying in the university. He always does…

Vitaly and Cycle time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output After Vitaly was expelled from the university, he became interested in the graph theory. Vitaly especially liked the cycles…

题目链接 n个点, m条边, 问最少加几条边可以出现一个奇环, 在这种情况下, 有多少种加边的方式. 具体看代码解释 #include<bits/stdc++.h> using namespace std; #define pb(x) push_back(x) #define ll long long #define mk(x, y) make_pair(x, y) #define lson l, m, rt<<1 #define mem(a) memset(a, 0, sizeo…

题意:给定两个相同长度的字符串,让你找出一个字符串,字典序在两都之间. 析:这个题当时WA了好多次,后来才发现是这么水,我们只要把 s 串加上,然后和算数一样,该进位进位,然后再和 t 比较就行. 代码如下: #include <iostream> #include <cstdio> #include <algorithm> #include <vector> #include <set> #include <cstring> #in…

题意简述 给定一个图 求至少添加多少条边使得它存在奇环 并求出添加的方案数 (注意不考虑自环) ----------------------------------------------------------------------------- 一道二分图染色的讨论题 比赛时只会用二分图染色判断树以及偶环 忘记用这个来判奇环... 二分图染色这种联赛知识点的题目现在也不会写了... ------------------------------------------------------…

D. Vitaly and Cycle Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/557/problem/D Description After Vitaly was expelled from the university, he became interested in the graph theory. Vitaly especially liked the cycles of an…

A. Vitaly and Night Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/595/problem/A Description One day Vitaly was going home late at night and wondering: how many people aren't sleeping at that moment? To estimate, Vitaly de…

time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output After Vitaly was expelled from the university, he became interested in the graph theory. Vitaly especially liked the cycles of an odd length in w…