Cod sursa(job #2286524)

Utilizator RaduXD1Nicolae Radu RaduXD1 Data 20 noiembrie 2018 14:06:49
Problema Stramosi Scor 80
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.57 kb
#include <fstream>
#include <cstring>
#include <algorithm>
# define mod 1000000
using namespace std;
ifstream fin("stramosi.in");
ofstream fout("stramosi.out");
int i,n,m,nod,poz,j,p[250001],t[250001][20];
int main(){
    fin>>n>>m;
    for(i=1;i<=n;i++)
        fin>>t[i][0];
    for(i=2;i<=n;i++)p[i]=p[i/2]+1;
    for(j=1;j<=p[n];j++)
        for(i=1;i<=n;i++)
            t[i][j]=t[t[i][j-1]][j-1];
    for(i=1;i<=m;i++)
    {
        fin>>nod>>poz;
        for(j=0;(1<<j)<=poz;j++)if(poz&(1<<j)) nod=t[nod][j];
        fout<<nod<<"\n";
    }
    return 0;
}