Package g0401_0500.s0404_sum_of_left_leaves

Class Solution

java.lang.Object
g0401_0500.s0404_sum_of_left_leaves.Solution
public class Solution extends Object
404 - Sum of Left Leaves.

Easy

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 <= Node.val <= 1000

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • sumOfLeftLeaves

      public int sumOfLeftLeaves(TreeNode root)