Cod sursa(job #2812311)

Utilizator cdenisCovei Denis cdenis Data 4 decembrie 2021 12:46:34
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.65 kb
#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("stramosi.in");
ofstream fout("stramosi.out");

const int LOG=18;
const int MAX=250005;
int n,m,q,p,v[LOG][MAX],lg[MAX];

int main()
{
    fin >> n >> m;
    lg[1]=0;
    for(int i=2;i<=n;i++)
        lg[i]=lg[i>>1]+1;
    for(int i=1;i<=n;i++)
        fin >> v[0][i];
    for(int i=1;(1<<i)<=n;i++)
        for(int j=1;j<=n;j++)
            v[i][j]=v[i-1][v[i-1][j]];
    for(;m;--m)
    {
        fin >> q >> p;
        while(p)
        {
            q=v[lg[p]][q];
            p-=(1<<lg[p]);
        }
        fout << q << '\n';
    }
    return 0;
}