Cod sursa(job #2656446)

Utilizator NeacsuMihaiNeacsu Mihai NeacsuMihai Data 7 octombrie 2020 19:04:53
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.76 kb
#include <iostream>
#include <fstream>

using namespace std;

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

int tt[250001];
int d[18][250001];

int main()
{
    int n, m, i, p, log;
    fin>>n>>m;

    for(i=1; i<=n; i++)
    {
        fin>>d[0][i];
    }

    log=0;
    while( (1<<log)<=n )
    {
        log++;
    }
    log--;


    for(p=1; p<=log; p++)
    {
        for(i=1; i<=n; i++)
        {
            d[p][i]=d[p-1][ d[p-1][i] ];
        }
    }

    for(i=1; i<=m; i++)
    {
        int nod, x;
        fin>>nod>>x;

        for(p=0; p<=log; p++)
        {
            if( (1<<p) & x )
            {
                nod=d[p][nod];
            }
        }

        fout<<nod<<"\n";
    }
}