Скачать с ютуб Minimum Window Substring: Utilizing Two Pointers & Tracking Character Mappings With A Hashtable в хорошем качестве

Minimum Window Substring: Utilizing Two Pointers & Tracking Character Mappings With A Hashtable

Code & Problem Statement @ https://backtobackswe.com/platform/co... Free 5-Day Mini-Course: https://backtobackswe.com Try Our Full Platform: https://backtobackswe.com/pricing 📹 Intuitive Video Explanations 🏃 Run Code As You Learn 💾 Save Progress ❓New Unseen Questions 🔎 Get All Solutions Question: Given a string S and a string T, find the minimum window in S which will contain all the characters in T (matching or exceeding in frequency) in complexity O(n). Anytime we have time reduced to linear time and we know that much must be done, that is indicative of using some sort of auxiliary structure to keep track of information for us so time can stay low in complexity. Complexities s = length of search string t = length of "pattern" or "character" string Time: O( s + t ) At worst we will touch each element twice, once by the left pointer and once by the right pointer. Ex: s = "aaaaat" t = "t" We will spend t time to build the character requirements hashtable. Space: O( s + t ) At worst the window hashtable will have a mapping for every character in s. At worst t will have all unique characters. s = "abcdef" t = "abcdef" ++++++++++++++++++++++++++++++++++++++++++++++++++ HackerRank:    / @hackerrankofficial   Tuschar Roy:    / tusharroy2525   GeeksForGeeks:    / @geeksforgeeksvideos   Jarvis Johnson:    / vsympathyv   Success In Tech:    / @successintech   ++++++++++++++++++++++++++++++++++++++++++++++++++ This question is 13.7 in the fantastic book Elements of Programming Interviews