1028. Recover a Tree From Preorder Traversal | leetcode daily challenge | shashcode | java | dsa

Problem Link: https://leetcode.com/problems/recover-a-tree-from-preorder-traversal/description/?envType=daily-question&envId=2025-02-22 Problem Statement: We run a preorder depth-first search (DFS) on the root of a binary tree. At each node in this traversal, we output D dashes (where D is the depth of this node), then we output the value of this node. If the depth of a node is D, the depth of its immediate child is D + 1. The depth of the root node is 0. If a node has only one child, that child is guaranteed to be the left child. Given the output traversal of this traversal, recover the tree and return its root. Solution Link: https://github.com/Tiwarishashwat/InterviewCodes/blob/main/RecoveraTreeFromPreorderTraversal.java Custom Comparator: https://youtu.be/quegYlReztM?si=G265RK8IFpP92_4b Lambda Expression: https://youtu.be/3DkmAUdrzKw?si=q9pqrvNPKAXt1g0d Dynamic Programming: https://youtu.be/P3MFBCZCGXs?si=A832THtbhyqPNAf2 Graph Playlist: https://www.youtube.com/playlist?list=PLQ7ZAf76c0ZOGuMjg3qwNgILb_dKWTxyQ Java Plus DSA Placement Course Playlist: https://youtube.com/playlist?list=PLQ7ZAf76c0ZPVdhV1bAjFv0bQc1xHURzE Java Plus DSA Sheet: https://docs.google.com/spreadsheets/d/119u25NO-4ZJ9zwfUKs5eGNo0exCVq3gZEFWvkCDiMqI/edit?usp=sharing Notes: https://github.com/Tiwarishashwat/Java-Plus-DSA-Placement-Course Telegram Link: https://shashwattiwari.page.link/telegramShashwat Ultimate Recursion Series Playlist: https://youtube.com/playlist?list=PLQ7ZAf76c0ZMzC9OHPbo-dUgx6oU3T0jK Instagram Handle: (@shashwat_tiwari_st) https://shashwattiwari.page.link/shashwatInsta Samsung Interview Experience: https://youtu.be/GrvlpBzphSU Company Tags: Facebook | Amazon | Microsoft | Netflix | Google | LinkedIn | Pega Systems | VMware | Adobe | Samsung Timestamp: 0:00 - Introduction 1:02 - understanding problem 2:57 - preorder traversal 10:45 - time complexity 11:00 - code 16:44 - stack 22:21 - code