题解 | #bit位数#

import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);

        while(in.hasNext()){
            solution(in);
        }
    }

    /**
     * 位运算: 异或
     * @param in
     */
    private static void solution(Scanner in){
        int m = in.nextInt();
        int n = in.nextInt();

        int z = m ^ n;
        String bits = Integer.toBinaryString(z);

        int result = bits.replaceAll("0", "").length();

        System.out.println(result);
    }
}