import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
   int n=sc.nextInt();
    int cnt=0;
    int max=-1;
    int val=0;
    for(int i=1; i<=n; i++){
      int element=i;
      boolean ok=true;
      while(ok){
        if(element%2==0){
          cnt++;
          element=element/2;
        }else{
          ok=false;
        }
      }
      if(max<cnt){
        max=cnt;
        val=i;
      }
      cnt=0;
    }
    System.out.println(val);
  }
}
/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