Cod sursa(job #2513066)

Utilizator Catalin_GriuGriu Catalin Catalin_Griu Data 22 decembrie 2019 12:52:15
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.66 kb
#include <iostream>
#include <fstream>
#define NMAX 250003
using namespace std;

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

int n, m;
int v[20][NMAX];

int main()
{
    int x, y;
    fin>>n>>m;

    for(int i=1; i<=n; i++)
        fin>>v[0][i];

    for(int j=1; j<=17; j++){
        for(int i=1; i<=n; i++)
            v[j][i] = v[j-1][v[j-1][i]];
    }

    for(int i=0; i<m; i++)
    {
        fin>>x>>y;
        for(int j=17; j>=0; j--)
        {
            if((1<<j)<=y)
            {
                y-=(1<<j);
                x = v[j][x];
            }
        }
        fout<<x<<'\n'   ;
    }
    return 0;
}