Cod sursa(job #3138902)

Utilizator petric_mariaPetric Maria petric_maria Data 23 iunie 2023 12:23:10
Problema Stramosi Scor 80
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.68 kb
#include <bits/stdc++.h>
using namespace std;
ifstream f("stramosi.in");
ofstream g("stramosi.out");
int n,m,i,t[250001],mat[20][250001],logg[250001],p,q,x,k;
int lsb(int k){
    return k&(-k);
}
int main()
{
    //cout<<lsb(12);
    f>>n>>m;
    for(i=1;i<=n;++i){
        f>>t[i]; mat[0][i]=t[i];
    }
    for(i=1;i<=n;++i)
        for(k=1;k<=18;++k) mat[k][i]=mat[k-1][mat[k-1][i]];
    logg[1]=0;
    for(i=2;i<=n;++i) logg[i]=logg[i/2]+1;
    for(i=1;i<=m;++i){
        f>>q>>p;
        while(p){
            x=lsb(p);
            q=mat[logg[x]][q];
            p-=x;
            //cout<<p<<' '<<q<<endl;
        }
        g<<q<<endl;
    }
    return 0;
}