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Cod sursa(job #566773)
#include<fstream>
using namespace std;
int S[20][250001],n,m;
ifstream in("stramosi.in");
ofstream out("stramosi.out");
inline void Constr()
{
bool ok=true;
int lv=0;
while(ok)
{
ok=false;
lv++;
for(int i=1;i<=n;i++)
{
int j=S[lv-1][i];
S[lv][i]=S[lv-1][j];
if(S[lv][i])
ok=true;
}
}
}
int main()
{
in>>n>>m;
for(int i=1;i<=n;i++)
{
in>>S[0][i];
}
Constr();
int x,y;
int niv;
for(;m;m--)
{
in>>x>>y;
niv=0;
while(y)
{
if(y%2)
x=S[niv][x];
y>>=1;
niv++;
}
out<<x<<'\n';
}
return 0;
}