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Palindrome Pairs

Hard

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Find all palindrome pairs in given list of words.

Sample Input:

["abcd","dcba","lls","s","sssll"]

Sample Output:

[[0,1],[1,0],[3,2],[2,4]]

Hints

Hint 1

Use hashmap for word lookups

Hint 2

Check all possible splits

Hint 3

Consider empty string case

Code Editor

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