Submission #36622548

---

Source Code Expand

#include <bits/stdc++.h>
using namespace std;
 
typedef long long int lli;

//lli N = 10e9+7;
//vector <vector <lli>> arr(N,);
//double eps = 1e-9;
 
void solve()
{
	lli n, q, i, t, a, b;
	cin>>n>>q;
	map <lli, map<lli, lli>> m;
	for(i=0;i<q;i++)
	{
		cin>>t>>a>>b;
		if(t==1) m[a][b]=1;
		else if(t==2) m[a][b]=0;
		else
		{
			if(m[a][b]==1 && m[b][a]==1) cout<<"Yes"<<'\n';
			else cout<<"No"<<'\n';
		}
	}
}
 
void usaco()
{
	freopen("diamond.in","r",stdin);
  	freopen("diamond.out","w",stdout);
}
 
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	solve();
}

Submission Info

Compile Error

./Main.cpp: In function ‘void usaco()’:
./Main.cpp:30:9: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
   30 |  freopen("diamond.in","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
./Main.cpp:31:11: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
   31 |    freopen("diamond.out","w",stdout);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Judge Result