Submission #500714

# Submission time Handle Problem Language Result Execution time Memory
500714 2021-12-31T21:34:08 Z aryan12 Star triangles (IZhO11_triangle) C++17
0 / 100
0 ms 204 KB
#include <bits/stdc++.h>
using namespace std;
#define int long long
 
int32_t main() {
  	ios_base::sync_with_stdio(0);
  	cin.tie(0);
  	int n;
  	cin >> n;
  	vector<pair<int, int> > a(n);
  	map<int, int> x, y;
  	for(int i = 0; i < n; i++) {
      	cin >> a[i].first >> a[i].second;
      	x[a[i].first]++;
      	y[a[i].second]++;
    }
  	int ans = 0;
  	for(int i = 0; i < n; i++) {
      	ans += x[a[i].first - 1] * y[a[i].second - 1];
    }
  	cout << ans << "\n";
}
# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -