Cod sursa(job #2915702)

Utilizator rares89_Dumitriu Rares rares89_ Data 24 iulie 2022 16:42:29
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.71 kb
#include <fstream>
#include <cmath>

using namespace std;

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

int n, q, t[20][250005];

int lift(int x, int y) {
    int nivel = 0;
    while(y > 0) {
        if(y & 1) {
            x = t[nivel][x];
        }
        nivel++;
        y >>= 1;
    }
    return x;
}

int main() {
    fin >> n >> q;
    for(int i = 1; i <= n; i++) {
        fin >> t[0][i];
    }
    for(int i = 1; (1 << i) <= n; i++) {
        for(int j = 1; j <= n; j++) {
            t[i][j] = t[i - 1][t[i - 1][j]];
        }
    }
    for(int i = 1; i <= q; i++) {
        int x, y;
        fin >> x >> y;
        fout << lift(x, y) << "\n";
    }
    return 0;
}