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[LeetCode - Daily Challenge] 404. Sum of Left Leaves

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem Given the root of a binary tree, return the sum of all left leaves. Example 1: Input: root = [3,9,20,null,null,15,7] Output: 24 Explanation: There are two left leaves in the binary tree, with values 9 and 15 respectively. Example 2: Input: root = [1] Output: 0 Constraints: The number of nodes in the tree is in the range [1, 1000]. -1000
Algorithm/LeetCode Daily Challenge 2021. 11. 5. 10:30
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