
백준 알고리즘 - 1110 (더하기사이클)


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;
public class Boj_1110 {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int[] splitNum = new int[2];
		
		int inputNum = Integer.parseInt(br.readLine());
		int sum = inputNum;
		int newNum;
		int cycle = 0;
		
		if(inputNum < 10) {
			splitNum[0] = 0;
			splitNum[1] = inputNum;
		} else {
			splitNum[0] = inputNum / 10;
			splitNum[1] = inputNum % 10;
		}
		while(true) {
			sum = splitNum[0] + splitNum[1];
			
			splitNum[0] = splitNum[1];
			splitNum[1] = sum % 10;
			cycle++;
			
			if( ((splitNum[0] * 10) + splitNum[1]) == inputNum) {
				System.out.println(cycle);
				break;
			}
		}
	}
}