[백준/자바] 1110번 - Java

import java.util.Scanner;
public class Main {
     public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
 
        int N = sc.nextInt();
        sc.close();
        
        int cnt = 0;
        int copy = N;
        
        while (true) {
            N = ((N % 10) * 10) + (((N / 10) + (N % 10)) % 10);
            cnt++;
 
            if (copy == N) {
                break;
            }
        }
        System.out.println(cnt);
    }
}