programmers_숫자 변환하기_java

https://school.programmers.co.kr/learn/courses/30/lessons/154538

프로그래머스

import java.util.*;

class Solution {
    public int solution(int x, int y, int n) {
        int answer = 0;
        
        answer = bfs(x, y, n);
        
        return answer;
    }
    
    public int bfs(int x, int y, int n){
        Queue<Integer> queue = new LinkedList<>();
        queue.offer(y);
        
        int level = 0;
        while(!queue.isEmpty()){
            int size = queue.size();
            for(int i = 0; i< size; i++){
                int now = queue.poll();
            
                if(now == x) return level;
                if(now < x) continue;
                
                if(now%2 == 0){
                    queue.offer(now/2);
                }
                if(now%3 == 0){
                    queue.offer(now/3);
                }
                queue.offer(now-n); 
            }
            level++;
        }
        
        return -1;
    }
}