Cod sursa(job #2155988)

Utilizator TudoseSanzianaTudose Sanziana TudoseSanziana Data 8 martie 2018 12:48:03
Problema Stramosi Scor 90
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.69 kb
#include <bits/stdc++.h>
using namespace std;

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

const int N_MAX = 250000, L_MAX = 17;

int n, m, p, q;
int stramosi[N_MAX + 2][L_MAX + 2];
// al (1 << j) - lea stramos al lui i

int main()
{
    in >> n >> m;
    for(int i = 1; i <= n; i++)
        in >> stramosi[i][0];

    for(int j = 1; j <= 18; j++)
    for(int i = 1; i <= n; i++)
        stramosi[i][j] = stramosi[stramosi[i][j - 1]][j - 1];

    while(m--)
    {
        in >> q >> p;
        for(int bit = 0; (1 << bit) <= p; bit++)
            if(p & (1 << bit))
                q = stramosi[q][bit];

        out << q << '\n';
    }

    return 0;
}