How to Solve Longest Palindrome by Concatenating Two Letter Words Problem
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Longest Palindrome by Concatenating Two Letter Words
You are given an array of strings words. Each element of words consists of two lowercase English letters. Create the longest possible palindrome by selecting some elements from words and concatenating...
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Understanding the Longest Palindrome by Concatenating Two Letter Words Problem
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Problem Statement
You are given an array of strings words. Each element of words consists of two lowercase English letters. Create the longest possible palindrome by selecting some elements from words and concatenating them in any order. Each element can be selected at most once. Return the length of the longest palindrome that you can create. If it is impossible to create any palindrome, return 0. A palindrome is a string that reads the same forward and backward.
Longest Palindrome by Concatenating Two Letter Words
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Examples
words = ["lc","cl","gg"]6One longest palindrome is "lc" + "gg" + "cl" = "lcggcl", of length 6. Note that "clgglc" is another longest palindrome that can be created.
words = ["ab","ty","yt","lc","cl","ab"]8One longest palindrome is "ty" + "lc" + "cl" + "yt" = "tylcclyt", of length 8. Note that "lcyttycl" is another longest palindrome that can be created.
words = ["cc","ll","xx"]2One longest palindrome is "cc", of length 2. Note that "ll" is another longest palindrome that can be created, and so is "xx".
Constraints
1 <= words.length <= 105words[i].length == 2words[i] consists of lowercase English letters.How Interview Coder Helps with Leetcode Problems
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