Submission #531531

#	Time	Username	Problem	Language	Result	Execution time	Memory
531531		devariaota	Star triangles (IZhO11_triangle)	C++17	0 / 100	2064 ms	1612 KiB

triangle

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

int main(){
  cin.tie(0) -> ios_base::sync_with_stdio(0);

  int n;
  cin >> n;
  vector<int> x(n), y(n);
  for(int i=0;i<n;i++)
  {
    cin >> x[i] >> y[i];
  }
  int ans = 0;
  for(int i=0;i<n;i++)
  {
    int cx = 0, cy = 0;
    for(int j=0;j<n;j++)
    {
      if(x[i] == x[j]) cx++;
      if(y[i] == y[j]) cy++;
    }
    ans += (cx - 1) * (cy - 1);
  }
  cout << ans << '\n';
  
}

• Subtask 1: 0 / 100