oj.uz

Submission #531533

# Submission time Handle Problem Language Result Execution time Memory
531533 2022-03-01T02:12:31 Z kebine Star triangles (IZhO11_triangle) C++17
0 / 100
 1 ms 312 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long

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

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

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Incorrect 1 ms 204 KB Output isn't correct
5 Halted 0 ms 0 KB -