#include <map>
#include <fstream>
using namespace std;
struct point {
int x, y;
};
map < int, int > ox;
map < int, int > oy;
ifstream cin("triangles.in");
ofstream cout("triangles.out");
int32_t main() {
ios::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
point a[n];
for (int i = 0; i < n; i++) {
cin >> a[i].x >> a[i].y;
ox[a[i].x]++;
oy[a[i].y]++;
}
int64_t res = 0;
for (int i = 0; i < n; i++) {
res += (ox[a[i].x] - 1) * (ox[a[i].y] - 1);
}
cout << res << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
