Submission #891182

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Source Code Expand

#include <iostream>
using namespace std;

int main(){
	int N;
	cin>>N;
	int a[100000];
	for(int i=0;i<N;i++){
		cin>>a[i];
		a[i]--;
	}

	int res = 0;
	for(int i=0;i<N;i++){
		for(int j=i+1;j<N;j++){
			if(a[i] == j && a[j]== i){
				res++;
			}
		}
	}
	cout<<res<<endl;
}

Submission Info

Judge Result