爆零系列—补题A

http://codeforces.com/contest/615/problem/A

 

读错题 结果发现是无脑题  直接标记统计

#include<cstdio>
#include<map>
#include<vector>
#include<stack>
#include<iostream>
#include<algorithm>
#include<cstring>
#include<cmath>
#include<queue>
#include<cstdlib> 
#include<climits>
#define PI acos(-1.0)
#define INF 0x3fffffff
using namespace std;
typedef long long ll;
typedef __int64 int64;
const ll MOD=1e9+7;
const int64 Mod=1e9+7;
const double eps=1e-9;
const int N= 110;
const int MAXN= 1;
typedef int rl; //这里更改输入挂类型 
inline void r(rl&num){
    num=0;rl f=1;char ch=getchar();
    while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
    while(ch>='0'&&ch<='9')num=num*10+ch-'0',ch=getchar();
    num*=f;
}
bool vis[N];
int main()
{
	int n,m,tem,t,sum=0;;
	r(n);r(m);
	while(n--)
	{
		
		r(tem);
		while(tem--)
		{
			r(t);
			if(!vis[t]){
				sum++;
				vis[t]=1;
			}
		}
	}
	if(sum==m) printf("YES\n");
	else printf("NO\n");
	return 0;
}