oj.uz

Submission #336916

# Submission time Handle Problem Language Result Execution time Memory
336916 2020-12-17T09:14:50 Z boykut Star triangles (IZhO11_triangle) C++14
0 / 100
 1 ms 384 KB 
#include <map>
#include <iostream>

using namespace std;

struct point {
  long double x, y;
};

map < long double, int64_t > ox;
map < long double, int64_t > 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 += max((int64_t)(0), (int64_t)((ox[a[i].x] - 1) * (ox[a[i].y] - 1)));
  }
  cout << res << '\n';
  return 0;
}

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Incorrect 1 ms 364 KB Output isn't correct
7 Halted 0 ms 0 KB -