题解 | #类型转换#

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

        //write code here......
        if (num <=0 ){
            System.out.println(num);
        } else {
            String s = String.valueOf(num);
            System.out.println(s.length());
        }

    }
}