Leetcode 290. Word Pattern
Word Pattern - LeetCode
Given a pattern and a string s, find if s follows the same pattern. Here follow means a full match, such that there is…
pattern and a string
s, find if
s follows the same pattern.
Here follow means a full match, such that there is a bijection between a letter in
pattern and a non-empty word in
Input: pattern = "abba", s = "dog cat cat dog"
Input: pattern = "abba", s = "dog cat cat fish"
Input: pattern = "aaaa", s = "dog cat cat dog"
1 <= pattern.length <= 300
patterncontains only lower-case English letters.
1 <= s.length <= 3000
scontains only lowercase English letters and spaces
sdoes not contain any leading or trailing spaces.
- All the words in
sare separated by a single space.
- to check the pattern match, I thought transfer string s to the pattern first. However, if pattern had same character, it will transfer to wrong result.
- if the string had some new letter other than the pattern, it won’t show the different
- Therefore, I use two transform function to change them into a new String. And compare the two string follow the same pattern or not.
- Leetcode descustion had shorter version of the answer