https://leetcode.com/problems/find-leaves-of-binary-tree/ https://leetcode.com/problems/find-leaves-of-binary-tree/discuss/83773/1-ms-Easy-understand-Java-Solution https://leetcode.com/problems/find-leaves-of-binary-tree/discuss/191609/10%2B-line-Java-solution-using-recursion https://leetcod...
For this question we need to take bottom-up approach. The key is to find the height of each node. The height of a node is the number of edges from the node to the deepest leaf. 1/**2* Definition for a binary tree node.3* public class TreeNode {4* int val;5* TreeNode left;6...
Leetcode 124 Binary Tree Maximum Path Sum (分治) Leetcode 226 Invert Binary Tree (分治) Leetcode 101 Symmetric Tree (回溯 or 分治) Leetcode 951 Flip Equivalent Binary Trees (分治) Leetcode 236 Lowest Common Ancestor of a Binary Tree (相似题:235、1650) (回溯 or 分治) Leetcode 105 Co...
Find the sum of all left leaves in a given binary tree. Example: 3 / \ 9 20 / \ 15 7 There are two left leaves in the binary tree, with values 9 and 15 respectively. Return 24. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 代码 通过递归 /** * Definition for a binary tree...
Consider all the leaves of a binary tree. From left to right order, the values of those leaves form a leaf value sequence. For example, in the given tree above, the leaf value sequence is (6, 7, 4, 9, 8).
left.val; } int sum = midSum + leftSum + rightSum; return sum; } } //层序遍历法 // 层序遍历迭代法 class Solution { public int sumOfLeftLeaves(TreeNode root) { int sum = 0; if (root == null) return 0; Queue<TreeNode> queue = new LinkedList<>();//双向队列也行 queue.offer...
0366 Find Leaves of Binary Tree 70.6% Medium 0367 Valid Perfect Square Go 41.7% Easy 0368 Largest Divisible Subset 38.1% Medium 0369 Plus One Linked List 58.2% Medium 0370 Range Addition 62.8% Medium 0371 Sum of Two Integers Go 50.7% Medium 0372 Super Pow Go 36.4% Medium 0373 ...
366 Find Leaves of Binary Tree Medium Solution 367 Valid Perfect Square Easy Solution 368 Largest Divisible Subset Medium Solution 369 Plus One Linked List Medium Solution 370 Range Addition Medium Solution 371 Sum of Two Integers Medium Solution 372 ? ? Solution 373 ? ? Solution 374 Guess Number...
0366 Find Leaves of Binary Tree 80.1% Medium 0367 Valid Perfect Square Go 43.3% Easy 0368 Largest Divisible Subset Go 41.2% Medium 0369 Plus One Linked List 60.9% Medium 0370 Range Addition 70.8% Medium 0371 Sum of Two Integers Go 50.7% Medium 0372 Super Pow Go 37.2% Medium 037...
Given a binary tree, return the preorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 代码语言:javascript 复制 1\2/3 return [1,2,3]. Note: Recursive solution is trivial, could you do it iteratively?