[백준] 14656번 : 조교는 새디스트야!! - C++

https://www.acmicpc.net/problem/14656

#include <iostream>

using namespace std;

int main() {
    int n;
    cin>>n;
    int count=0;
    for(int i=1;i<=n;i++){
        int a;
        cin>>a;
        if(a!=i) count++;
    }
    cout<<count;
}