#1493Easy#35 in TikTok's list· asked at 1 company
Path Sum
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What we know
Example 1
Input: root = [5,4,8,11,null,13,4,7,2,null,null,null,1], targetSum = 22 Output: true
5 -> 4 -> 11 -> 2 sums to 22.
Example 2
Input: root = [1,2,3], targetSum = 5 Output: false
Example 3
Input: root = [], 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