INCOMPLETE SEARCH

#include<iostream>
#include<list>
using namespace std;
int main()
{
    int n,s,i,data[50],link[50],item,ptr;
    cin>>n;
    cin>>s;
    for(i=0;i<n;i++)
     {

       cin>>data[i]>>link[i];
     }
      ptr=s;
      cin>>item;
    while(ptr!=-1)
    {
       if(item==data[ptr])
          cout<<"found";
       else
        ptr=link[ptr];
    }

}