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Submission #40887

# Submission time Handle Problem Language Result Execution time Memory
40887 2018-02-09T18:05:37 Z Abelyan Star triangles (IZhO11_triangle) C++14
100 / 100
 419 ms 38988 KB 
#include <bits/stdc++.h>
using namespace std;

const int N=300000;
map<int,int> x,y;
int a[N],b[N];

int main() {
	ios_base::sync_with_stdio(false);
	long long ans=0;
	int n;
	cin>>n;
	for (int i=0;i<n;i++){
		cin>>a[i]>>b[i];
		x[a[i]]++;
		y[b[i]]++;
	}
	for (int i=0;i<n;i++){
		ans+=(long long)(x[a[i]]-1)*(long long)(y[b[i]]-1);
	}
	cout<<ans<<endl;
	return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 1 ms 452 KB Output is correct
4 Correct 1 ms 560 KB Output is correct
5 Correct 1 ms 580 KB Output is correct
6 Correct 1 ms 584 KB Output is correct
7 Correct 1 ms 588 KB Output is correct
8 Correct 1 ms 596 KB Output is correct
9 Correct 2 ms 664 KB Output is correct
10 Correct 2 ms 664 KB Output is correct
11 Correct 2 ms 680 KB Output is correct
12 Correct 11 ms 1340 KB Output is correct
13 Correct 8 ms 1616 KB Output is correct
14 Correct 13 ms 2100 KB Output is correct
15 Correct 143 ms 7180 KB Output is correct
16 Correct 156 ms 9720 KB Output is correct
17 Correct 136 ms 11788 KB Output is correct
18 Correct 176 ms 13900 KB Output is correct
19 Correct 378 ms 21480 KB Output is correct
20 Correct 277 ms 25124 KB Output is correct
21 Correct 405 ms 32292 KB Output is correct
22 Correct 419 ms 38988 KB Output is correct