import java.util.*;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int N = Integer.parseInt(sc.next());
        
        int ans = 1;
        int max = 0;
        for(int i=1; i<=N; i++){
            int n = i;
            int count = 0;
            while(true){
                if(n % 2 == 1){
                    break;
                }else{
                    n /=2;
                    count++;
                }
            }
            
            if(max < count){
                ans = i;
                max = count;
            }
        }
        System.out.println(ans);
    }
}
/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