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Submission #89880

# Submission time Handle Problem Language Result Execution time Memory
89880 2018-12-18T17:56:19 Z popovicirobert Star triangles (IZhO11_triangle) C++14
100 / 100
 492 ms 20028 KB 
#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
#define ld long double
// 217
// 44

using namespace std;

const int MAXN = (int) 3e5;

pair <int, int> pts[MAXN + 1];

map <int, int> frx, fry;

int main() {
    //ifstream cin("A.in");
    //ofstream cout("A.out");
    int i, n;
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin >> n;
    for(i = 1; i <= n; i++) {
        int x, y;
        cin >> x >> y;
        pts[i] = {x, y};
        frx[x]++;
        fry[y]++;
        //fr[{x, y}]++;
    }
    ll ans = 0;
    for(i = 1; i <= n; i++) {
        ans += 1LL * (frx[pts[i].first] - 1) * (fry[pts[i].second] - 1);
    }
    cout << ans;
    //cin.close();
    //cout.close();
    return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 5 ms 516 KB Output is correct
4 Correct 2 ms 516 KB Output is correct
5 Correct 2 ms 516 KB Output is correct
6 Correct 2 ms 516 KB Output is correct
7 Correct 2 ms 516 KB Output is correct
8 Correct 2 ms 516 KB Output is correct
9 Correct 2 ms 532 KB Output is correct
10 Correct 3 ms 572 KB Output is correct
11 Correct 3 ms 708 KB Output is correct
12 Correct 21 ms 1292 KB Output is correct
13 Correct 9 ms 1456 KB Output is correct
14 Correct 17 ms 2040 KB Output is correct
15 Correct 171 ms 7204 KB Output is correct
16 Correct 170 ms 9512 KB Output is correct
17 Correct 161 ms 10716 KB Output is correct
18 Correct 174 ms 10716 KB Output is correct
19 Correct 480 ms 12264 KB Output is correct
20 Correct 324 ms 15956 KB Output is correct
21 Correct 492 ms 20028 KB Output is correct
22 Correct 475 ms 20028 KB Output is correct