Cod sursa(job #1375582)

Utilizator diana97Diana Ghinea diana97 Data 5 martie 2015 13:41:32
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.73 kb
#include <iostream>
#include <fstream>

using namespace std;

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

const int NMAX = 250000 + 1, LOGMAX = 18;

int n, q;
int d[LOGMAX][NMAX];

void citeste() {
    f >> n >> q;
    for (int i = 1; i <= n; i++) f >> d[0][i];
}

void precalculeaza() {
    for (int i = 1; (1 << i) <= n; i++) {
        for (int j = 1; j <= n; j++) {
            d[i][j] = d[i - 1][d[i - 1][j]];
           // cout << d[i][j] << ' ';
        }
    }
}

void rezolva() {
    int a, b;
    int k;
    while (q--) {
        f >> a >> b;
        for (int i = 0; (1 << i) <= b; i++)
            if (b & (1 << i)) a = d[i][a];
        g << a << '\n';
    }
}

int main() {
    citeste();
    precalculeaza();
    rezolva();
}