problem112

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112. Path Sum (Easy)

Given the root of a binary tree and an integer targetSum, return true if the tree has a root-to-leaf path such that adding up all the values along the path equals targetSum.

A leaf is a node with no children.

 

Example 1:

Input: root = [5,4,8,11,null,13,4,7,2,null,null,null,1], targetSum = 22
Output: true

Example 2:

Input: root = [1,2,3], targetSum = 5
Output: false

Example 3:

Input: root = [1,2], targetSum = 0
Output: false

 

Constraints:

• The number of nodes in the tree is in the range [0, 5000].
• -1000 <= Node.val <= 1000
• -1000 <= targetSum <= 1000

Related Topics

[Tree] [Depth-first Search]

Similar Questions

1. Path Sum II (Medium)
2. Binary Tree Maximum Path Sum (Hard)
3. Sum Root to Leaf Numbers (Medium)
4. Path Sum III (Medium)
5. Path Sum IV (Medium)

Documentation

Index

• type TreeNode

Types

type TreeNode

type TreeNode = kit.TreeNode

TreeNode - Definition for a binary tree node.