#include<bits/stdc++.h>
using namespace std;
struct point
{
int x,y;
};
point p[300000];
int x[100000],y[100000];
int n;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cin>>n;
for(int i=0;i<n;i++)
{
cin>>p[i].x>>p[i].y;
x[p[i].x]++;
y[p[i].y]++;
}
int ans=0;
for(int i=0;i<n;i++)
{
ans+=(x[p[i].x]-1)*(y[p[i].y]-1);
}
cout<<ans<<"\n";
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2392 KB |
Output is correct |
4 |
Correct |
1 ms |
2656 KB |
Output is correct |
5 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |