import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner x = new Scanner(System.in);//构造一个SCANNER对象,其传入参数为SYSTEM.IN int n = x.nextInt();//读取一个INT数值 String str = ""; while(n!=0) { str = n%2+str; n = n/2; } System.out.println(str); } }