Cod sursa(job #2283126)

Utilizator TooHappyMarchitan Teodor TooHappy Data 15 noiembrie 2018 00:14:38
Problema Stramosi Scor 80
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.81 kb
#include <bits/stdc++.h>
 
using namespace std;
 
// ifstream cin("date.cin");
// ofstream out("date.out");

const int Nmax = 250010;

int stramos[Nmax][18];

int main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    freopen("stramosi.in", "r", stdin);
    freopen("stramosi.out", "w", stdout);

    int n, m; cin >> n >> m;

    for(int i = 1; i <= n; ++i) {
        cin >> stramos[i][0];
    }

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

    for(int i = 1; i <= m; ++i) {
        int q, p; cin >> q >> p;

        while(p) {
            int k = log2(p);
            q = stramos[q][k];
            p -= (1 << k);
        }

        cout << q << "\n";
    }

    // in.close(); out.close();
 
    return 0;
}