Cod sursa(job #2189409)

Utilizator JiyuuNoTsubasaMaria Guran JiyuuNoTsubasa Data 28 martie 2018 10:57:49
Problema Stramosi Scor 90
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.62 kb
#include <fstream>

using namespace std;
ifstream in("stramosi.in");
ofstream out("stramosi.out");
int n,m,stra[250005][20],p,q;
int main()
{
    in>>n>>m;
    for (int i=1; i<=n; i++)
        in>>stra[i][0];
    for (int j=1; (1<<j)<=n; j++)
        for (int i=1; i<=n; i++)
            stra[i][j]=stra[stra[i][j-1]][j-1];
    for (int i=1; i<=m; i++)
    {
        in>>q>>p;
        int j=18;
        while (p)
        {
            if ((1<<j)<=p)
            {
                q=stra[q][j];
                p-=(1<<j);
            }
            j--;
        }
        out<<q<<'\n';
    }
    return 0;
}