oj.uz

Submission #318733

# Submission time Handle Problem Language Result Execution time Memory
318733 2020-11-03T03:47:42 Z Temmie Star triangles (IZhO11_triangle) C++17
100 / 100
 541 ms 11620 KB 
#include <bits/stdc++.h>

typedef long long ll;

struct P {
	ll x, y;
	void read(std::map <ll, ll>& mx, std::map <ll, ll>& my) {
		std::cin >> x >> y;
		bool existX = mx.find(x) == mx.end(), existY = my.find(y) == my.end();
		mx[x]++, my[y]++;
		mx[x] -= existX, my[y] -= existY;
	}
};

int main() {
	std::ios::sync_with_stdio(0); std::cin.tie(0);
	
	int n; std::cin >> n;
	ll ans = 0;
	std::map <ll, ll> mx, my;
	std::vector <P> a(n);
	for (auto& p : a) p.read(mx, my);
	while (n--) ans += mx[a[n].x] * my[a[n].y];
	std::cout << ans << "\n";
	//std::cout.flush(); std::cin >> n;
	
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 10 ms 1260 KB Output is correct
13 Correct 10 ms 1388 KB Output is correct
14 Correct 15 ms 1772 KB Output is correct
15 Correct 190 ms 7908 KB Output is correct
16 Correct 197 ms 8292 KB Output is correct
17 Correct 175 ms 7908 KB Output is correct
18 Correct 178 ms 8060 KB Output is correct
19 Correct 486 ms 11108 KB Output is correct
20 Correct 356 ms 9956 KB Output is correct
21 Correct 541 ms 11620 KB Output is correct
22 Correct 526 ms 11492 KB Output is correct