给定一种规律 pattern 和一个字符串 str ,判断 str 是否遵循相同的规律。
这里的 遵循 指完全匹配,例如, pattern 里的每个字母和字符串 str 中的每个非空单词之间存在着双向连接的对应规律。
示例1:
输入: pattern = "abba", str = "dog cat cat dog"
输出: true
来源:力扣(LeetCode)
链接:https://leetcode-cn.com/problems/word-pattern
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split分割单词,用两个map分别映射
class Solution:
def wordPattern(self, pattern: str, s: str) -> bool:
word2ch = dict()
ch2word = dict()
words = s.split()
if len(pattern) != len(words):
return False
for ch, word in zip(pattern, words):
if (word in word2ch and word2ch[word] != ch) or (ch in ch2word and ch2word[ch] != word):
return False
word2ch[word] = ch
ch2word[ch] = word
return True