Cod sursa(job #2611811)

Utilizator isa_tudor_andreiAndrei Tudor isa_tudor_andrei Data 7 mai 2020 16:52:55
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.76 kb
#include <fstream>

using namespace std;

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

const int NMAX = 250000;
const int LOGMAX = 18;

int t[LOGMAX + 1][NMAX + 1];

int main() {
    int n, m;
    fin>>n>>m;
    for( int i = 1; i <= n; i ++ )
      fin>>t[0][i];
    for( int dim = 1; (1<<dim) <= n; dim ++ )
      for( int i = 1; i <= n; i ++ )
        t[dim][i] = t[dim - 1][t[dim - 1][i]];
    while( m -- ) {
      int node, depth;
      fin>>node>>depth;
      int pas;
      for( pas = 1; (1<<pas) <= depth; pas ++ );
      int level = 0;
      while( pas ) {
        pas --;
        if( level + (1<<pas) <= depth )
          level += (1<<(pas)), node = t[pas][node];
      }
      fout<<node<<"\n";
    }
    return 0;
}