Submission #36644635

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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, i, q, a, x, pos, ins=0;
	cin>>n;
	vector <vector<lli>> arr;
	vector <lli> v(n+1, 0);
	arr.push_back(v);
	for(i=1;i<=n;i++) cin>>arr[0][i];
	cin>>q;
	for(i=0;i<q;i++)
	{
		cin>>a;
		if(a==1){cin>>x;vector<lli>vec(n+1, x);arr.push_back(vec);ins++;}
		else if(a==2){cin>>pos>>x;arr[ins][pos]+=x;}
		else {cin>>pos;cout<<arr[ins][pos]<<'\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