import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int A = scan.nextInt();
		int [] B = new int [A];
		int ans = 0;
		
		for(int i = 1; i<A;i++){
			B[i-1] = i;
		}
		B[A-1] = A;
	
		if(Arrays.binarySearch(B, 64) >= 0){
			ans = 64;
		} else if (Arrays.binarySearch(B, 32) >= 0){ 
			ans = 32;
		} else if (Arrays.binarySearch(B, 16) >= 0){ 
			ans = 16;
		} else if (Arrays.binarySearch(B, 8) >= 0){ 
			ans = 8;
		} else if (Arrays.binarySearch(B, 4) >= 0){ 
			ans = 4;
		} else if (Arrays.binarySearch(B, 2) >= 0){ 
			ans = 2;
		} else if (Arrays.binarySearch(B, 1) >= 0){ 
			ans = 1;;
		}
		
		System.out.println(ans);
		//System.out.println(Arrays.toString(B));
		
	}
	
	
}
/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