#include <iostream>
#include <fstream>

using namespace std;

ifstream f("stramosi.in");
ofstream g("stramosi.out");

int N, M, s[250010], i, Q, P, verif = 1, aux;

int main()
{
    f >> N >> M;
    for(i = 1; i <= N; i++)
        {
            f >> s[i];
            if(s[i] != i - 1)
                verif = 0;

        }
    for(i = 1; i <= M; i++)
    {
        f >> Q >> P;
        if(verif)
        {
            if(Q - P > 0)
                g << Q - P <<"\n";
            else
                g << 0 << "\n";
        }
        else
            {
                while(P && Q)
                {
                    P--;
                    Q = s[Q];
                }
                g << Q <<"\n";
            }

    }
    return 0;
}