import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int limit = sc.nextInt();
    int max =0;
    int result=1;
    for(int i=1; i<=limit; i++){
        int tmp =i;
        int cnt=0;
        while(true){
            if(tmp%2!=0){
                break;
            }
            tmp=tmp/2;
            cnt++;
        }
        if(cnt>max){
            max =cnt;
            result=i;
        }
    }
    System.out.println(result);
  }
}
/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