Submission #992666

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define pb push_back
#define rep(i,s,t) for(int i = s; i <= t; ++ i)
const int MaxN = 100050;

int n, m;
vector<int> L[MaxN];
int K, LI, fa[MaxN];

int f(int x){return fa[x] == x?x:fa[x]=f(fa[x]);}

int main()
{
    scanf("%d%d",&n,&m);
    rep(i,1,n) 
    {
        scanf("%d",&K);
        rep(j,1,K)
        {
            scanf("%d",&LI);
            L[LI].pb(i);
        }
    }
    rep(i,1,n) fa[i] = i;
    rep(i,1,m) if(L[i].size()>1) rep(j,1,L[i].size()-1) fa[f(L[i][j])]=f(L[i][j-1]);
    rep(i,1,n) if(f(i) != f(1)) {puts("NO"); return 0;}
    puts("YES");
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:16:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
                        ^
./Main.cpp:19:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&K);
                       ^
./Main.cpp:22:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&LI);
                            ^

Judge Result