Submission #1590528

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int N;
    cin >> N;
    int A[N];
    for(int i = 0; i < N; i++)
    {
        cin >> A[i];
    }
    int c = 0;
    int m;
    for(int k = 0; k < N; k++)
    {
        m = A[k];
        if(A[m - 1] == k + 1)
        {
            c = c + 1;
        }
        else
        {
        
        }
    }
    cout << c/2 << endl;

}

Submission Info

Judge Result