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Submission #4855

# Submission time Handle Problem Language Result Execution time Memory
4855 2014-01-05T10:04:36 Z cki86201 Star triangles (IZhO11_triangle) C++
100 / 100
 480 ms 6588 KB 
#include<stdio.h>
#include<map>
using namespace std;

typedef long long ll;
map <int,int> M[2];
map <int,int>::iterator p;
int x[300030],y[300030];

int main(){
	int n,i;
	scanf("%d",&n);
	for(i=0;i<n;i++){
		scanf("%d%d",x+i,y+i);
		M[0][x[i]]++, M[1][y[i]]++;
	}
	ll ans = 0;
	for(i=0;i<n;i++)ans += (ll)(M[0][x[i]]-1) * (M[1][y[i]]-1);
	printf("%lld",ans);
	return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3552 KB Output is correct
2 Correct 0 ms 3552 KB Output is correct
3 Correct 0 ms 3552 KB Output is correct
4 Correct 0 ms 3552 KB Output is correct
5 Correct 0 ms 3552 KB Output is correct
6 Correct 0 ms 3552 KB Output is correct
7 Correct 0 ms 3552 KB Output is correct
8 Correct 0 ms 3552 KB Output is correct
9 Correct 0 ms 3552 KB Output is correct
10 Correct 0 ms 3552 KB Output is correct
11 Correct 0 ms 3552 KB Output is correct
12 Correct 8 ms 3948 KB Output is correct
13 Correct 8 ms 3948 KB Output is correct
14 Correct 8 ms 4344 KB Output is correct
15 Correct 152 ms 6456 KB Output is correct
16 Correct 176 ms 6456 KB Output is correct
17 Correct 152 ms 6456 KB Output is correct
18 Correct 180 ms 6456 KB Output is correct
19 Correct 448 ms 6588 KB Output is correct
20 Correct 324 ms 6588 KB Output is correct
21 Correct 480 ms 6588 KB Output is correct
22 Correct 444 ms 6588 KB Output is correct