Cod sursa(job #1571862)

Utilizator AdrianVrAdrian Stefan Vramulet AdrianVr Data 18 ianuarie 2016 16:31:42
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.78 kb
#include <fstream>
using namespace std;
ifstream f("stramosi.in");
ofstream g("stramosi.out");
int a[20][250010],q,p,n,m;
int putere(int x)
{
    int aux=0;
    while(x>1)
    {
        x/=2;
        aux++;
    }
    return aux;
}
int main()
{
    f>>n>>m;
    for(int i=1; i<=n; i++)
        f>>a[1][i];
    for(int i=2; i<=19; i++)
        for(int j=1; j<=n; j++)
        {
            a[i][j]=a[i-1][a[i-1][j]];
        }
    for(int i=1; i<=n; i++) a[0][i]=i;

    for(int i=1; i<=m; i++)
    {
        f>>q>>p;
        while(p)
        {
            int l;
            l=putere(p);

            p=p-(1<<l);
            //nu merge decat la puterile lui 2, logic
            q=a[l+1][q];
        }
        g<<q;
        g<<'\n';
    }

    return 0;
}