文章目录

1. 1. Sum Of Left Leaves

Sum Of Left Leaves

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int helper(TreeNode *node, bool isFromLeft)
{
	if (node != NULL)
	{
		if (isFromLeft && node->left == NULL && node->right == NULL)
				return node->val;
		else
			return helper(node->left, true) + helper(node->right, false);
	}
	else
		return 0;
}