Github 同步地址: https://github.com/grandyang/leetcode/issues/1080 参考资料: https://leetcode.com/problems/insufficient-nodes-in-root-to-leaf-paths/ https://leetcode.com/problems/insufficient-nodes-in-root-to-leaf-paths/discuss/308326/JavaC%2B%2BPython-Easy-and-Concise-Recursion LeetCode All ...
A node isinsufficientif every root toleafpath intersecting this node has a sum strictly less thanlimit. Aleafis a node with no children. Example 1: Input:root = [1,2,3,4,-99,-99,7,8,9,-99,-99,12,13,-99,14], limit = 1Output:[1,2,3,4,null,null,7,8,9,null,14] Example...
Leetcode之深度优先搜索(DFS)专题-1080. 根到叶路径上的不足节点(Insufficient Nodes in Root to Leaf Paths) 这篇是DFS专题的第一篇,所以我会写下具体的解题步骤和过程,以及我当时的思路,有改进的地方,希望指正,共同进步。 给定一棵二叉树的根root,请你考虑它所有 从根到叶的路径:从根到任何叶的路径。(所...
Description Given the root of a binary tree, consider all root to leaf paths: paths from the root to any leaf. (A leaf is a node with no children.) A node is insufficient if every such root to leaf path intersecting this node has sum strictly less than limit. Delete all insufficient ...
Right != nil { result += dfs(root.Right, pathSum + root.Right.Val) } return result } 题目链接: Sum Root to Leaf Numbers : leetcode.com/problems/s 求根节点到叶节点数字之和: leetcode.cn/problems/su LeetCode 日更第 365 天,感谢阅读至此的你 欢迎点赞、收藏、在看鼓励支持小满...
The root-to-leaf path 1->3 represents the number 13. Therefore, sum = 12 + 13 = 25. 1. 2. 3. 4. 5. 6. 7. 8. 9. Example 2: Input: [4,9,0,5,1] 4 / \ 9 0 / \ 5 1 Output: 1026 Explanation: The root-to-leaf path 4->9->5 represents the number 495. ...
The root-to-leaf path 4->9->1 represents the number 491. The root-to-leaf path 4->0 represents the number 40. Therefore, sum = 495 + 491 + 40 = 1026. 【Idea】 跟求path的题差不多, 只不过这里是num*10+node.val 在每层递归里作参数传递罢辽。
publicList<String>binaryTreePaths(TreeNode root){List<String>list=newArrayList<String>();if(root!=null)preOrder(root,"",list);returnlist;}publicvoidpreOrder(TreeNode node,String path,List<String>list){if(node.left==null&&node.right==null){list.add(path+node.val);}if(node.left!=null){...
[LeetCode]129.Sum Root to Leaf Numbers 【题目】 Given a binary tree containing digits from0-9only, each root-to-leaf path could represent a number. An example is the root-to-leaf path1->2->3which represents the number123. Find the total sum of all root-to-leaf numbers....
The root-to-leaf path1->3represents the number13. Return the sum = 12 + 13 =25. 题目本身看起来很简单的,但是如果对于对属性结构和递归编程不是那么熟的人来说就会遇到很多细节的问题了。后来参考了网上的一些答案,发现基本上都没有详细解析的,也许高手们不屑去分析吧。倒是LeetCode上还是有分析得挺好...