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Cod sursa(job #487541)
#include<fstream>
const int N=2500001;
using namespace std;
ifstream f("stramosi.in");
ofstream g("stramosi.out");
int a[18][N],n,m,q,p;
int stra(int v,int n)
{
int lin=0;
while(n)
{
if(n%2)
v=a[lin][v];
lin++;
n/=2;
}
return v;
}
int main()
{
int i,j;
f>>n>>m;
for(i=1;i<=n;i++)
f>>a[0][i];
for(i=1;(1<<i)<=n;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;
g<<stra(q,p)<<"\n";
}
return 0;
}