Submission #1538663

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Source Code Expand

#include <iostream>
#include <algorithm>
#include <time.h>
#include <stack>
#include <string>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <vector>
#include <queue>
#include <map>
#include <set>
#include <cassert>

using namespace std;

const int N = 100005;
const int inf = 1000 * 1000 * 1000;
const int mod = 1000 * 1000 * 1000 + 7;

int n,m,sz;
bool used[N] , mark[N];
vector <int> g[N] , glezu[N];
queue <int> q;

int main(){
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        int q;
        scanf("%d",&q);
        while(q--){
            int lezu;
            scanf("%d",&lezu);
            g[i].push_back(lezu);
            glezu[lezu].push_back(i);
        }
    }
    sz++;
    used[1] = true;
    q.push(1);
    while(!q.empty()){
        int mard = q.front();
        q.pop();
        for(int i=0;i<(int)g[mard].size();i++){
            int lezu = g[mard][i];
            if(mark[lezu])continue;
            mark[lezu] = true;
            for(int j=0;j<(int)glezu[lezu].size();j++){
                int Mard = glezu[lezu][j];
                if(used[Mard] == false){
                    used[Mard] = true;
                    q.push(Mard);
                    sz++;
                }
            }
        }
    }
    if(sz == n)
        cout<<"YES"<<endl;
    else
        cout<<"NO"<<endl;
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:30:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&q);
                       ^
./Main.cpp:33:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&lezu);
                              ^

Judge Result