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Submission #975972

# Submission time Handle Problem Language Result Execution time Memory
975972 2024-05-06T04:12:18 Z vjudge1 Star triangles (IZhO11_triangle) C++17
100 / 100
 254 ms 9088 KB 
#include <bits/stdc++.h>
using namespace std;
#define futaba ios_base::sync_with_stdio(false); cin.tie(NULL);
#define rio return 0;
#define ll long long

// Fun things are fun. //

ll x[300005], y[300005];

int main() {
    // freopen("generate.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    futaba
    int n;
    cin >> n;
    map<ll, ll> cntx, cnty;
    for(int i = 1; i <= n; i++) {
        cin >> x[i] >> y[i];
        cntx[x[i]]++;
        cnty[y[i]]++;
    }
    ll ans = 0;
    for(int i = 1; i <= n; i++) ans += ((cntx[x[i]] - 1) * (cnty[y[i]] - 1));
    cout << ans << '\n';
    rio
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 2 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2648 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 5 ms 3164 KB Output is correct
13 Correct 8 ms 3164 KB Output is correct
14 Correct 12 ms 3672 KB Output is correct
15 Correct 98 ms 8620 KB Output is correct
16 Correct 97 ms 8532 KB Output is correct
17 Correct 89 ms 8440 KB Output is correct
18 Correct 87 ms 8624 KB Output is correct
19 Correct 237 ms 9060 KB Output is correct
20 Correct 178 ms 8960 KB Output is correct
21 Correct 249 ms 9088 KB Output is correct
22 Correct 254 ms 9040 KB Output is correct