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Submission #165993

# Submission time Handle Problem Language Result Execution time Memory
165993 2019-11-30T04:43:39 Z Gurban Star triangles (IZhO11_triangle) C++11
0 / 100
 2 ms 376 KB 
#include <bits/stdc++.h>

#define pb push_back
#define ss second
#define ff first
#define N 100005
#define inf 1000000009
#define ll long long
#define mid(a,b) (a+b)/2

using namespace std;

ll n;
ll sum;
pair <ll,ll> a[3 * N];
map <ll,ll> m,p;

int main()
{
	cin >> n;
	for(int i = 1;i <= n;i++){
		cin >> a[i].ff >> a[i].ss;
		m[a[i].ff]++;
		p[a[i].ss]++;
	}
	for(int i = 1;i <= n;i++)
		sum += ((m[a[i].ff] - (ll)1) * (m[a[i].ss] - (ll)1));
	cout << sum << '\n';
}

Subtask #1
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 2 ms 376 KB Output is correct
4 Incorrect 2 ms 376 KB Output isn't correct
5 Halted 0 ms 0 KB -