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Submission #525278

# Submission time Handle Problem Language Result Execution time Memory
525278 2022-02-11T08:54:09 Z LucaIlie Star triangles (IZhO11_triangle) C++17
100 / 100
 296 ms 11772 KB 
#include <iostream>
#include <unordered_map>

#define MAX_N 300000

using namespace std;

int x[MAX_N], y[MAX_N];
unordered_map <int, int> mpx, mpy;

int main() {
    int n, i;
    long long nrTri;

    cin >> n;
    for ( i = 0; i < n; i++ ) {
        cin >> x[i] >> y[i];
        mpx[x[i]]++;
        mpy[y[i]]++;
    }

    nrTri = 0;
    for ( i = 0; i < n; i++ )
        nrTri += ((long long)mpx[x[i]] - 1) * (mpy[y[i]] - 1);

    cout << nrTri;

    return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 304 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 9 ms 844 KB Output is correct
13 Correct 12 ms 1080 KB Output is correct
14 Correct 13 ms 1220 KB Output is correct
15 Correct 98 ms 5804 KB Output is correct
16 Correct 109 ms 6136 KB Output is correct
17 Correct 95 ms 5800 KB Output is correct
18 Correct 96 ms 5832 KB Output is correct
19 Correct 275 ms 11356 KB Output is correct
20 Correct 188 ms 8820 KB Output is correct
21 Correct 284 ms 11724 KB Output is correct
22 Correct 296 ms 11772 KB Output is correct