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 scanner = new Scanner(System.in);
    int num =scanner.nextInt();
    int num2 = 0;
    while(num>0){
        if(num==1){
            num2++;
            break;
        }
        if(num%2==1){
            num2++;
        }
        num = num/2;
    }
    System.out.println(num2);

}

}