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Grokking the Coding Interview Patterns in Python

Solution: Sum of Distances in a Tree

Explore how to solve the sum of distances in a tree problem using two DFS traversals. Understand subtree size calculation and propagate distance sums efficiently across nodes to optimize time complexity.

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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] ...