Cod sursa(job #2364536)

Utilizator Anastasia11Susciuc Anastasia Anastasia11 Data 4 martie 2019 09:33:27
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.68 kb
#include <iostream>
#include <fstream>
#include <vector>
#define Nmax 250005

using namespace std;

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

int n, q, x;
int log2[Nmax];
int s[20][Nmax];

void build()
{
    for (int i = 1; (1<<i) <= n; i++)
    {
        for (int j = 1; j <= n; j++)
            s[i][j]=s[i-1][s[i-1][j]];
    }
}

int main()
{
    f >> n >> q;
    for (int i = 1; i <= n; i++)
    {
        f >> x;
        s[0][i]=x;
    }
    build();
    while(q--)
    {
        int x, y;
        f >> x >> y;
        for (int i = 0; i <= 20; i++)
            if(y&(1<<i)) x=s[i][x];
        g << x << '\n';
    }
    return 0;
}