Submission #1331115

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
#define ran 222222
int n,m;
vector<int> e[ran];
bool vis[ran];
void dfs(int x){
	if(vis[x])return;
	vis[x] = true;
	for(vector<int>::iterator it = e[x].begin(); it!=e[x].end(); it++){
		dfs(*it);
	}
}
int main(){
	scanf("%d%d",&n,&m);
	for(int i=1; i<=n; i++){
		int x,y;
		for(scanf("%d",&x); x--;){
			scanf("%d",&y);
			y += n;
			e[i].push_back(y);
			e[y].push_back(i);
		}
	}
	dfs(1);
	bool fl = true;
	for(int i=1; i<=n; i++)if(!vis[i])
		fl = false;
	puts(fl?"YES":"NO");
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:15:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:18:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   for(scanf("%d",&x); x--;){
                     ^
./Main.cpp:19:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&y);
                  ^

Judge Result