oj.uz

Submission #888259

# Submission time Handle Problem Language Result Execution time Memory
888259 2023-12-16T17:37:46 Z presko Star triangles (IZhO11_triangle) C++14
0 / 100
 0 ms 348 KB 
#include<iostream>
#include<bits/stdc++.h>
#define MAXN 300010
using namespace std;
map<int,int> row,col;
pair<int,int> p[MAXN];
int main()
{
    int n;
    long long ans=0;
    ios_base::sync_with_stdio(false);
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>p[i].first>>p[i].second;
        row[p[i].second]++;
        col[p[i].first]++;
    }
    for(int i=1;i<=n;i++)
    {
        long long l=row[p[i].first]-1;
        long long r=row[p[i].second]-1;
        l=l*r;
        ans+=l;
    }
    cout<<ans<<"\n";
}

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -