import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		try {
			Scanner cin = new Scanner(System.in);
			long input=cin.nextLong();
			long n = 0;
			String str=Long.toBinaryString(input);
			n=str.lastIndexOf('1');
			long a=1;
			a<<=(n-1);
			a++;
			System.out.print(a);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

• Re:为什么RE? (440) SE06llm 2007-07-06 22:35:23