513. Find Bottom Left Tree Value

LeetCodeTreeDepth-First SearchBreadth-First SearchBinary TreeOpen on judge ↗

Given the root of a binary tree, return the leftmost value in the last row of the tree. Example 1: Input: root = [2,1,3] Output: 1 Example 2: Input: root = [1,2,3,4,null,5,6,null,null,7] Output: 7 Constraints: - The number of nodes in the tree is in the range [1, 104]. - -231 <= Node.val <= 231 - 1

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solution.cppC++17

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