Submission #896115

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Source Code Expand

#include <iostream>
//#include <algorithm>
//#include <string>
//#include <functional>
using namespace std;
int main() {
  
    /*string x;
    cin>>x;
    char part1[20];
    char part2[20];
 
    x.copy(part1,4,0);
    x.copy(part2,8,4);
    
    cout<<part1<<" "<<part2<< endl;*/
    int count;
    cin>>count;
    
    int list[count+1]; // array of known length
    //cout << "enter the sequence of " << count << " numbers space separated: ";
    // user inputs values space separated in one line.  Inputs more than the count are discarded.
    for (int i=1; i<count+1; i++) {
        cin >> list[i];
    }
    //cout<<list[4]<<endl;
    int final;
    int result[count+1];
    for(int z=0;z<count+1;z++) {
        result[z]=0;
    }
    for (int y=1;y<count+1;y++) {
        int temp= list[y];
        if(temp==y){result[y]=1;}
        if(list[temp])
        {
            int temp2=list[temp];
            if(result[temp]==0){
                if(temp2==y){
                    result[temp]=1;
                    final++;
                }
            }
                    }
        else
        {result[y]=1;}
    }
    cout<<final/2<<endl;
    
   
    return 0;
}

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