Cod sursa(job #1113668)

Utilizator diana97Diana Ghinea diana97 Data 20 februarie 2014 19:59:40
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.74 kb
#include <iostream>
#include <fstream>

using namespace std;

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

int n, m;
int v[19][1<<19];

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


void rezolva () {
    for (int i = 1; 1<<i <= n; i++)
        for (int j = 1; j <= n; j++)
            v[i][j] = v[i-1][v[i-1][j]];

}

int query (int q, int p) {
    int sol = q;
    for (int i = 0; 1<<i <= p; i++) {
        if ((1<<i) & p) {
            sol = v[i][sol];
        }
    }
    return sol;
}


int main () {
    citeste ();
    rezolva ();
    int q, p;
    for (int i = 1; i <= m; i++) {
        f >> q >> p;
        g << query (q, p) << '\n';
    }
    return 0;
}