Description Sum of Left Leaves Table of ContentsDescription Sum of Left LeavesExample 1Example 2ConstraintsSolutionTime ComplexitySpace Complexity Given the root of a binary tree, return the sum of all left leaves. A leaf is a node with no children. A left leaf is a leaf that is the left child of another node. Example 1 <strong>Input:</strong> root = [3,9,20,null,null,15,7] <strong>Output:</strong> 24 <strong>Explanation:</strong> There ...