import java.util.*;
class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        if(n>=64){
            System.out.println(64);
        } else if(n>=32){
            System.out.println(32);
        } else if(n>=16){
            System.out.println(16);
        } else if(n>=8){
            System.out.println(8);
        } else if(n>=4){
            System.out.println(4);
        } else if(n>=2){
            System.out.println(2);
        } else {
            System.out.println(1);
        }
    }
}
/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