题解 | #求int型正整数在内存中存储时1的个数#

import java.util.*;

public class Main {
    public static void main(String []args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int number = sc.nextInt();
            System.out.println(Integer.toString(number, 2).replaceAll("0", "").length());
        }
    }
}