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Cod sursa(job #682839)
#include<fstream>
#include<cmath>
using namespace std;
ifstream f("stramosi.in");
ofstream g("stramosi.out");
int a[20][250005];
int main ()
{
int i,n,m,j,p,q,rasp,max;
//freopen("stramosi.in","r",stdin);
//freopen("stramosi.out","w",stdout);
f>>n>>m;
for (i=1; i<=n; i++)
f>>a[0][i];
max=log2(n);
for (i=1; i<=max; i++)
for (j=1; j<=n; j++)
a[i][j]=a[i-1][a[i-1][j]];
for (i=1; i<=m; i++)
{
f>>q>>p;
rasp=q; max=log2(p);
for (j=max; j>=0; j--)
if (p & (1<<j))
rasp=a[j][rasp];
g<<rasp<<"\n";
}
return 0;
}