Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in C#

Solution: Sum of Distances in a Tree

Explore how to solve the sum of distances problem in a connected, undirected tree using depth-first search. Learn to perform two DFS traversals to compute subtree sizes and propagate distance sums efficiently. This lesson helps you understand and implement an O(n) time and space solution crucial for tree-based coding interview questions.

We'll cover the following...

Statement

Given a connected, undirected tree with n nodes, labeled from 00 to n−1n - 1, and n−1n - 1 edges. The edges are provided in an array, where each element edges[i] =[ai,bi]= [a_i, b_i] represents an edge between nodes aia_i and bi ...