Submission #382266

#	Time	Username	Problem	Language	Result	Execution time	Memory
382266		ritul_kr_singh	Star triangles (IZhO11_triangle)	C++17	100 / 100	446 ms	9068 KiB

triangle

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define sp << " " <<
#define nl << "\n"

signed main(){
	cin.tie(0)->sync_with_stdio(0);
	map<int, int> x, y;
	int n; cin >> n;
	pair<int, int> a[n];
	for(auto &i : a) cin >> i.first >> i.second, ++x[i.first], ++y[i.second];
	int ans = 0;
	for(auto i : a) ans += (x[i.first]-1LL)*(y[i.second]-1LL);
	cout << ans;
}

• Subtask 1: 100 / 100