How to Solve Longest Common Prefix of K Strings After Removal Problem
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Longest Common Prefix of K Strings After Removal
You are given an array of strings words and an integer k. For each index i in the range [0, words.length - 1], find the length of the longest common prefix among any k strings (selected at distinct in...
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Understanding the Longest Common Prefix of K Strings After Removal Problem
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Problem Statement
You are given an array of strings words and an integer k. For each index i in the range [0, words.length - 1], find the length of the longest common prefix among any k strings (selected at distinct indices) from the remaining array after removing the ith element. Return an array answer, where answer[i] is the answer for ith element. If removing the ith element leaves the array with fewer than k strings, answer[i] is 0.
Longest Common Prefix of K Strings After Removal
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Examples
words = ["jump","run","run","jump","run"], k = 2[3,4,4,3,4]Removing index 0 ("jump"): words becomes: ["run", "run", "jump", "run"]. "run" occurs 3 times. Choosing any two gives the longest common prefix "run" (length 3). Removing index 1 ("run"): words becomes: ["jump", "run", "jump", "run"]. "jump" occurs twice. Choosing these two gives the longest common prefix "jump" (length 4). Removing index 2 ("run"): words becomes: ["jump", "run", "jump", "run"]. "jump" occurs twice. Choosing these two gives the longest common prefix "jump" (length 4). Removing index 3 ("jump"): words becomes: ["jump", "run", "run", "run"]. "run" occurs 3 times. Choosing any two gives the longest common prefix "run" (length 3). Removing index 4 ("run"): words becomes: ["jump", "run", "run", "jump"]. "jump" occurs twice. Choosing these two gives the longest common prefix "jump" (length 4).
words = ["dog","racer","car"], k = 2[0,0,0]Removing any index results in an answer of 0.
Constraints
1 <= k <= words.length <= 1051 <= words[i].length <= 104words[i] consists of lowercase English letters.The sum of words[i].length is smaller than or equal 105.How Interview Coder Helps with Leetcode Problems
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