Class Solution


  • public class Solution
    extends Object
    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:** ![](https://assets.leetcode.com/uploads/2021/01/18/pathsum1.jpg) **Input:** root = [5,4,8,11,null,13,4,7,2,null,null,null,1], targetSum = 22 **Output:** true **Example 2:** ![](https://assets.leetcode.com/uploads/2021/01/18/pathsum2.jpg) **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`
    • Constructor Detail

      • Solution

        public Solution()
    • Method Detail

      • hasPathSum

        public boolean hasPathSum​(TreeNode root,
                                  int sum)