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Submission #88425

# Submission time Handle Problem Language Result Execution time Memory
88425 2018-12-05T21:01:27 Z xiaowuc1 Star triangles (IZhO11_triangle) C++14
100 / 100
 157 ms 6160 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int x[300000];
int y[300000];
void solve() {
  unordered_map<int, int> xs;
  unordered_map<int, int> ys;
  int n;
  cin >> n;
  for(int i = 0; i < n; i++) {
    cin >> x[i] >> y[i];
    xs[x[i]]++;
    ys[y[i]]++;
  }
  ll ret = 0;
  for(int i = 0; i < n; i++) {
    ret += (xs[x[i]] - 1LL) * (ys[y[i]] - 1LL);
  }
  cout << ret << endl;
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  solve();
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 416 KB Output is correct
4 Correct 2 ms 548 KB Output is correct
5 Correct 2 ms 548 KB Output is correct
6 Correct 2 ms 548 KB Output is correct
7 Correct 2 ms 548 KB Output is correct
8 Correct 2 ms 696 KB Output is correct
9 Correct 2 ms 696 KB Output is correct
10 Correct 2 ms 696 KB Output is correct
11 Correct 2 ms 728 KB Output is correct
12 Correct 7 ms 1276 KB Output is correct
13 Correct 7 ms 1320 KB Output is correct
14 Correct 10 ms 1588 KB Output is correct
15 Correct 58 ms 4372 KB Output is correct
16 Correct 63 ms 4500 KB Output is correct
17 Correct 57 ms 4500 KB Output is correct
18 Correct 57 ms 4500 KB Output is correct
19 Correct 142 ms 5924 KB Output is correct
20 Correct 122 ms 5924 KB Output is correct
21 Correct 157 ms 6084 KB Output is correct
22 Correct 148 ms 6160 KB Output is correct