Cod sursa(job #1328243)

Utilizator alexmisto342Turdean Alexandru alexmisto342 Data 28 ianuarie 2015 09:50:28
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.65 kb
#include <fstream>
using namespace std;
ifstream fin("stramosi.in");
ofstream fout("stramosi.out");
int d[20][250000],i,j,a,b,n,m;
int main()
{
    fin>>n>>m;
    for(i=1;i<=n;i++)
        fin>>d[0][i];
    for(i=1;1<<i<=n;i++)
    {
        for(j=1;j<=n;j++)
            d[i][j]=d[i-1][d[i-1][j]];
    }
    for(i=1;i<=m;i++)
    {
        fin>>a>>b;
        j=0;while((1<<(j+1))<=b)
                j++;
        while(j>=0)
        {
            a=d[j][a];
            b-=1<<j;
            while((1<<j)>b)
                j--;
            if(b==0)
                break;
        }
        fout<<a<<'\n';
    }
    return 0;
}