#1465Hard#18 in Expedia Group's list· asked at 3 companies
Palindrome Pairs
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What we know
Example 1
Input: words = ["abcd","dcba","lls","s","sssll"] Output: [[0,1],[1,0],[3,2],[2,4]]
The palindromes are "abcddcba", "dcbaabcd", "slls", "llssssll".
Example 2
Input: words = ["bat","tab","cat"] Output: [[0,1],[1,0]]
Example 3
Input: words = ["a",""] Output: [[0,1],[1,0]]
Constraints
- •
1 <= words.length <= 5000 - •
0 <= words[i].length <= 300 - •
words[i]consists of lowercase English letters.