Cod sursa(job #3363586)

Utilizator RaresPanuPanu Rares RaresPanu Data 19 august 2026 15:59:49
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.69 kb
#include <fstream>
#include <iostream>

using namespace std;

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

int str[250001][18];

void build(int n) {
    for (int i=1;i<=17;i++) {
        for (int j=1;j<=n;j++) {
            str[j][i]=str[str[j][i-1]][i-1];
        }
    }
}

int main(){
    int n,q;
    fin>>n>>q;
    for (int i=1;i<=n;i++) {
        fin >> str[i][0];
    }
    build(n);
    for (int i=1;i<=q;i++) {
        int a,b;
        fin >> a >> b;
        int rez=a;
        int bit=0;
        while ((1<<bit)<=b) {
            if ((b>>bit)&1) {
                rez=str[rez][bit];
            }
            bit++;
        }
        fout << rez << "\n";
    }
    return 0;
}