# | TimeUTC-0 | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
330924 | ZwariowanyMarcin | Star triangles (IZhO11_triangle) | C++14 | 397 ms | 10092 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define sz(x) (int)x.size()
using ll = long long;
using namespace std;
const int N = 1 << 20;
int n, x[N], y[N];
ll res;
map<int, int> dx, dy;
int main() {
scanf("%d", &n);
for (int i = 0; i < n; ++i) {
scanf("%d%d", x + i, y + i);
dx[x[i]]++;
dy[y[i]]++;
}
for (int i = 0; i < n; ++i)
res += 1LL * (dx[x[i]] - 1) * (dy[y[i]] - 1);
printf("%lld\n", res);
return 0;
}
Compilation message (stderr)
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