Cod sursa(job #2684896)

Utilizator vladiouzPetru-Vlad Ionescu vladiouz Data 15 decembrie 2020 09:35:09
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.7 kb
#include <iostream>
#include <fstream>
using namespace std;

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

int n,m,x,y,r[19][250001],pow2[19];

int main()
{
    f>>n>>m;
    int lim=0,p=1;
    pow2[0]=1;
    while(p<=n)
    {
        lim++;
        p*=2;
        pow2[lim]=p;
    }
    lim--;
    for(int i=1;i<=n;i++)
        f>>r[0][i];
    for(int k=1;k<=lim;k++)
    {
        for(int i=1;i<=n;i++)
        {
            r[k][i]=r[k-1][r[k-1][i]];
        }
    }
    for(int i=1;i<=m;i++)
    {
        f>>x>>y;
        for(int j=0;j<=18;j++)
        {
            if(y&(1<<j))
                x=r[j][x];
        }
        ff<<x<<"\n";
    }
    return 0;
}