Cod sursa(job #1537961)

Utilizator feli2felicia iuga feli2 Data 28 noiembrie 2015 12:25:29
Problema Stramosi Scor 100
Compilator cpp 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 nmax=250005;

int f[18][nmax], p, q, n, m, i, j;

int query(int p, int q)
{
    for(int i=0;(1<<i)<=p;i++)
    {
        if((1<<i)&p)
            q=f[i][q];
    }
    return q;
}

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