[Java] 백준 <1110-더하기 사이클>

https://www.acmicpc.net/problem/1110

 

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		String N = sc.next();
		String ch = N;
		int cnt = 0; 
		
		while(true) {
			if(Integer.parseInt(ch) < 10) {
				ch = 0 + ch;
			}
			
			int sum = (int)ch.charAt(0)-'0' + (int)ch.charAt(1)-'0';
			int newNum = ((int)ch.charAt(1)-'0')*10 + sum%10;
			ch = newNum + "";
			cnt++;
			if(Integer.parseInt(N) == newNum) {
				break;
			}
		}
		
		System.out.println(cnt);
		
	}

}