bfs - 단어 변환 / 파이썬

from collections import deque

def ck(w1, w2):
    cnt = 0
    lenth = len(w1)
    for i in range(lenth):
        if w1[i] == w2[i]: cnt += 1
    return True if cnt == lenth-1 else False

def solution(begin, target, words):
    if target not in words:
        return 0
    q = deque()
    for w in words:
        if ck(begin, w):
            q.append([w, 1])
    while q:
        word, cnt = q.popleft()
        if word == target:
            return cnt
        for w in words:
            if ck(word, w):
                q.append([w, cnt+1])
    return 0

 

 

programmers.co.kr/learn/courses/30/lessons/43163

코딩테스트 연습 - 단어 변환