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Leetcode 113. Path Sum II

Find all root-to-leaf paths in a binary tree whose node values sum to targetSum, returning each path as a list of values. This is solved with DFS/backtracking that accumulates the running sum (note values may be negative and tree size ≤ 5000).

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Amazon

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Late October, 2025

Microsoft

Mid-level

Early May, 2025

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