- Difficulty: Easy
- Tags: LeetCode, Easy, Hash Table, String, leetcode-290, O(n), O(c)
Problem
Given a 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 s
.
Example 1:
Input: pattern = "abba", s = "dog cat cat dog" Output: true
Example 2:
Input: pattern = "abba", s = "dog cat cat fish" Output: false
Example 3:
Input: pattern = "aaaa", s = "dog cat cat dog" Output: false
Constraints:
1 <= pattern.length <= 300
pattern
contains only lower-case English letters.1 <= s.length <= 3000
s
contains only lowercase English letters and spaces' '
.s
does not contain any leading or trailing spaces.- All the words in
s
are separated by a single space.