题解 | #十进制数转二进制数#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int num = scanner.nextInt();
        StringBuffer str=new StringBuffer();
        if(num==0){
            str.append(0);
        }
        while(num!=0){
            int n=num%2;
            str.append(n);
            num/=2;
        }
        str=str.reverse();
        System.out.println(str.toString());
    }
}