Cod sursa(job #2684693)

Utilizator DariusGhercaDarius Gherca DariusGherca Data 14 decembrie 2020 16:25:18
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.68 kb
#include <bits/stdc++.h>
using namespace std;
ifstream f("stramosi.in");
ofstream g("stramosi.out");
const int N=25e4+5;
int tata[N],str[20][N],n;
int main()
{
    int m;
    f>>n>>m;
    for(int i=1;i<=n;i++)
    {
        f>>tata[i];
        str[0][i]=tata[i];
    }
    ///precalcularea
    for(int k=1;k<=log2(n);k++)
    {
        for(int i=1;i<=n;i++)
        {
            str[k][i]=str[k-1][str[k-1][i]];
        }
    }
    ///end_precalc
    for(int i=1;i<=m;i++)
    {
        int q,p,l;
        f>>q>>p;
        for(int t=0;t<=18;t++)
        {
            if(p&(1<<t))
            q=str[t][q];
        }
        g<<q<<"\n";
    }
    return 0;
}