Freshman's Database

#include <iostream>

using namespace std;


int main() {
    int n;
    cin >> n;

    int c = 0;
    
    std::ios::sync_with_stdio(true);

    int *p = new int[n];
    int *v = new int[n];
    for (int i = 0; i < n; i++) {
        cin >> p[i];
        v[i] = 0;
    }

    for(int i = 0; i <  n; i++) {
        if (v[i]) continue; // HAS BEEN VISITED
        int j = p[i];
        while(j != i && !v[j]) {
            v[j] = 1;
            j = p[j];
        }
        if (j == i) c++;
    }

    cout << c << endl;
    
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER