Cod sursa(job #2454096)

Utilizator StanCatalinStanCatalin StanCatalin Data 7 septembrie 2019 14:03:49
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.03 kb
#include <iostream>
#include <vector>
#include <algorithm>
#include <fstream>

using namespace std;

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

const int dim = 250005;

int rmq[20][dim],lg[dim];
vector <int> binar;

int n,m;

int main()
{
    in >> n >> m;
    for (int i=1; i<=n; i++)
    {
        in >> rmq[0][i];
    }
    lg[1] = 0;
    for (int i=2; i<=n; i++)
    {
		lg[i] = lg[i/2] + 1;
    }
    for (int i=1; i<=18; i++)
    {
        for (int j=1; j<=n; j++)
        {
            rmq[i][j] = rmq[i-1][rmq[i-1][j]];
        }
    }
    int p,q;
    int rez = 0,putere,j;
    for (int i=1; i<=m; i++)
    {
        in >> q >> p;
        binar.clear();
        while (p != 0)
        {
            binar.push_back(p%2);
            p /= 2;

        }
        rez = q;
        for (j = 0; j<binar.size(); j++)
        {
            if (binar[j] == 1)
            {
                rez = rmq[j][rez];
            }
        }
        out << rez << "\n";
    }
    return 0;
}