Cod sursa(job #1630753)

Utilizator DenisONIcBanu Denis Andrei DenisONIc Data 5 martie 2016 11:08:45
Problema Stramosi Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.64 kb
#include <fstream>
#include <cstdio>
using namespace std;

ifstream f("stramosi.in");
ofstream g("stramosi.out");

int n,m,i,j,p,nr,q,dp[250005][20];


int main()
{
    f>>n>>m;
    for (i=1;i<=n;++i)
        f>>dp[i][0];
    int ok;
    for (j=1;(1<<j)<=n && ok;++j)
    {
        ok=0;
        for (i=1;i<=n;++i)
        {
            dp[i][j]=dp[dp[i][j-1]][j-1];
            if (dp[i][j]!=0)
                ok=1;
        }
    }
    for (i=1;i<=m;++i)
    {
        f>>q>>p;
        for (int j = 0; (1<<j) <= p; ++j)
            if ((1<<j) & p)
                q = dp[q][j];
        g<<q<<'\n';
    }
    return 0;
}