How to Solve Step- By- Step Directions From a Binary Tree Node to Another Problem
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Step-By-Step Directions From a Binary Tree Node to Another
You are given the root of a binary tree with n nodes. Each node is uniquely assigned a value from 1 to n. You are also given an integer startValue representing the value of the start node s, and a dif...
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Understanding the Step- By- Step Directions From a Binary Tree Node to Another Problem
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Problem Statement
You are given the root of a binary tree with n nodes. Each node is uniquely assigned a value from 1 to n. You are also given an integer startValue representing the value of the start node s, and a different integer destValue representing the value of the destination node t. Find the shortest path starting from node s and ending at node t. Generate step-by-step directions of such path as a string consisting of only the uppercase letters 'L', 'R', and 'U'. Each letter indicates a specific direction: 'L' means to go from a node to its left child node. 'R' means to go from a node to its right child node. 'U' means to go from a node to its parent node. Return the step-by-step directions of the shortest path from node s to node t.
Step-By-Step Directions From a Binary Tree Node to Another
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Examples
root = [5,1,2,3,null,6,4], startValue = 3, destValue = 6"UURL"The shortest path is: 3 → 1 → 5 → 2 → 6.
root = [2,1], startValue = 2, destValue = 1"L"The shortest path is: 2 → 1.
Constraints
The number of nodes in the tree is n.2 <= n <= 1051 <= Node.val <= nAll the values in the tree are unique.1 <= startValue, destValue <= nstartValue != destValueHow Interview Coder Helps with Leetcode Problems
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