#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define pll pair<ll,ll>
const ll MOD=1e9+7;
//#define ll int
//KALAU TAKUT RTE
bool cmp (pair<ll,ll> x, pair<ll,ll>y){
return x.second < y.second;
}
signed main(){
ios_base::sync_with_stdio(0); cin.tie(0);
ll n; cin>>n;
ll x[n+1], y[n+1], cntx[n+1], cnty[n+1];
for (int i=1; i<=n;i++){
cin>>x[i]>>y[i];
cntx[x[i]]++; cnty[y[i]]++;
}
ll ans=0;
for (int i=1; i<=n;i++){
ans+= (cntx[x[i]]-1) * (cnty[y[i]]-1);
}
cout<<ans<<endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
