Substring With Concatenation Of All Words
Solve substring with concatenation of all words using sliding window & hash map. Precompute word frequencies, slide window, shrink or expand based on matches. Time complexity: O(n⋅k), space complexity: O(m+k).
Top Interview 150 The Substring with Concatenation of All Words problem is a challenging sliding window and hash map problem. Let’s break it down step by step to solve it efficiently. 🚀 Problem Description Given a string s and an array of strings words: Each word in words is of the same length. A valid concatenated substring is a substring of s that contains all the strings from words concatenated in any order. Return an array of the starting indices of all such substrings in s. 💡 Examples Example 1 Input: s = "barfoothefoobarman", words = ["foo", "bar"] Output: [0...