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Submission #523927

# Submission time Handle Problem Language Result Execution time Memory
523927 2022-02-08T12:19:33 Z Bill_00 Star triangles (IZhO11_triangle) C++14
100 / 100
 150 ms 11856 KB 
#include <bits/stdc++.h>
#define MOD 1000000007
typedef long long ll;
using namespace std;

int x[1000000], y[1000000];
unordered_map<int, ll> um[2];

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	int n;
	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> x[i] >> y[i];
		um[0][x[i]]++;
		um[1][y[i]]++;
	}
	ll ans = 0;
	for(int i = 1; i <= n; i++){
		ans += ((um[0][x[i]] - 1) * (um[1][y[i]] - 1));
	}
	cout << ans;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 316 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 316 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 5 ms 840 KB Output is correct
13 Correct 5 ms 956 KB Output is correct
14 Correct 5 ms 1196 KB Output is correct
15 Correct 45 ms 5884 KB Output is correct
16 Correct 48 ms 6076 KB Output is correct
17 Correct 48 ms 5836 KB Output is correct
18 Correct 40 ms 5828 KB Output is correct
19 Correct 106 ms 11180 KB Output is correct
20 Correct 100 ms 8956 KB Output is correct
21 Correct 150 ms 11856 KB Output is correct
22 Correct 123 ms 11816 KB Output is correct