Submission #1497971

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Source Code Expand

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

#define FOR(i,l,r) for(int i = int(l);i < int(r);i++)
template<typename T> bool chmax(T& a,const T& b){ return a < b ? (a = b,true) : false; }
template<typename T> bool chmin(T& a,const T& b){ return b < a ? (a = b,true) : false; }
typedef long long ll;

int N,K,R;
vector<int> A;

int main()
{
	scanf("%d%d",&N,&K);
	A.assign(N,0);
	FOR(i,0,K){
		int sz;
		scanf("%d",&sz);
		FOR(j,0,sz){
			int x;
			scanf("%d",&x);
			A [x - 1] = i;
		}
	}

	scanf("%d",&R);
	deque<bool> bad(N);
	FOR(i,0,R){
		int p,q;
		scanf("%d%d",&p,&q);
		p--;
		q--;
		if(A [p] == A [q]){
			bad [p] = bad [q] = true;
		}
	}

	printf("%d\n",accumulate(bad.begin(),bad.end(),0));

	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:14:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&N,&K);
                     ^
./Main.cpp:18:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&sz);
                  ^
./Main.cpp:21:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&x);
                  ^
./Main.cpp:26:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&R);
                ^
./Main.cpp:30:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&p,&q);
                      ^

Judge Result