Cod sursa(job #2766360)

Utilizator BalasaRaduBalasa Radu BalasaRadu Data 31 iulie 2021 20:24:20
Problema Stramosi Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.72 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(){
    int ct=1;
    for(int ex=1;ex*2<=n;ex++){
        for(int i=1;i<=n;i++)
            rmq[ct][i]=rmq[ct-1][rmq[ct-1][i]];
        ct++;
    }
}

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';
    }
}