Cod sursa(job #2766361)

Utilizator BalasaRaduBalasa Radu BalasaRadu Data 31 iulie 2021 20:28:37
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.7 kb
#include <bits/stdc++.h>
using namespace std;

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

const int dim=550009;

int n,m;
int rmq[30][dim];

void generare(){
    for(int i=1;i<=n;i++){
        for(int j=1;(1<<j)<=n;j++){
            rmq[j][i]=rmq[j-1][rmq[j-1][i]];
        }
    }
}

int Query(int q,int p){
    for(int i=0;(1<<i)<=p;i++){
        if((p&(1<<i))!=0)
            q=rmq[i][q];
    }
    return q;
}

signed main(){
        fin>>n>>m;
    for(int i=1;i<=n;i++){
        int x;
        fin>>x;
        rmq[0][i]=x;
    }
    generare();
    for(int i=1;i<=m;i++){
        int p,q;
        fin>>q>>p;
        fout<<Query(q,p)<<'\n';
    }
}