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Cod sursa(job #395142)
#include <fstream>
using namespace std;
#define doila(z) (1<<z)
#define nmax 350010
int A[20][nmax];
int main()
{
ifstream f("stramosi.in");
ofstream g("stramosi.out");
int n,m,i,j,k,p,q;
f>>n>>m;
for(i=1;i<=n;i++)
f>>A[0][i];
for(i=1;doila(i)<=n;++i)
{
for(j=1;j<=n;++j)A[i][j]=A[i-1][A[i-1][j]];
}
for(k=1;k<=m;++k)
{
f>>p>>q;
while(p && q)
for(i=q;i>=0 && p && q;--i)
if(doila(i)<=q && p && q)
{
p=A[i][p];
q-=doila(i);
}
g<<p<<endl;
}
return 0;
}