import java.util.*;
import java.math.BigInteger;
class Main{

     public static void main(String []args){
      Scanner scan = new Scanner(System.in);
      int x = scan.nextInt();
      for(int i = 6 ; i >=0 ; i--){
          if(Math.pow(2,i)<=x){
            System.out.println((int)Math.pow(2,i));
            break;
          }
      }
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz