#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream f("stramosi.in");
ofstream g("stramosi.out");
using namespace std;

int n,m,i,q,p,x,j,k,l;
vector <int> t[250005];
vector <int> vt;
int main()
{
    f>>n;
    f>>m;
    vt.push_back(0);
    for(i=1;i<=n;i++)
    {
        f>>x;
        cout<<"OK";
        vt.push_back(x);
        t[i].push_back(i);
        t[i].push_back(vt[i]);
        j=1;
        k=i;
        while(t[k][t[k].size()-1]!=0)
        {
            t[k].push_back(t[vt[k]][j]);
            j++;

        }
      }
    for(i=1;i<=m;i++)
    {

        f>>q;f>>p;
        if(t[q].size()>p)
       g<<t[q][p]<<endl;
       else
        g<<0<<endl;
    }
}