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Cod sursa(job #848432)
#include<fstream>
using namespace std;
int a[250001][21],i,j,n,m,x,y,k;
int main()
{
ifstream f("stramosi.in");
ofstream g("stramosi.out");
f >> n >> m;
for (i=1;i<=n;i++)
f >> a[i][0];
for (j=1;j<=16;j++)
for (i=1;i<=n;i++)
a[i][j]=a[a[i][j-1]][j-1];
for (i=1;i<=m;i++)
{
f >> x >> y;
k=1;
for (j=0;y>0;j++)
{
if ((y & k)>0)
{
x=a[x][j];
y-=k;
}
k*=2;
}
g << x << "\n";
}
return 0;
}