Cod sursa(job #1966522)

Utilizator CriistinaMicula Cristina Criistina Data 15 aprilie 2017 12:38:09
Problema Stramosi Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.72 kb
#include <iostream>
#include <fstream>
#define Nmax 250001
using namespace std;
ifstream f("stramosi.in");
ofstream g("stramosi.out");

int s[Nmax][20], n, m;

int stramos(int q, int p)
{
    int k=q, nr=0;
    while(p!=0)
    {
        if(k==0)
            return 0;
        if(p%2==1)
            k=s[k][nr];
        p/=2;
        nr++;
    }
    return k;
}
int main()
{
    f>>n>>m;
    for(int i=1;i<=n;i++)
    {
        f>>s[i][0];
    }
    for(int i=1;i<=18;i++)
    {
        for(int j=1;j<=n;j++)
        {
            s[j][i]=s[s[j][i-1]][i-1];
        }
    }
    for(int i=1;i<=m;i++)
    {
        int x,y;
        f>>x>>y;
        g<<stramos(x,y)<<'\n';
    }
    return 0;
}