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给定一个二叉树和所要查找的两个节点，找到两个节点的最近公共父亲节点（LCA）。比如，节点5和1的LCA是3，节点5和4的LCA是5。 class Solution { public TreeNode lowestCommonAncestor(TreeNode root, TreeNode p, Tr 阅读全文
posted @ 2022-11-27 23:34
MarkLeeBYR
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Example 1: Input: head = [1,2,2,1] Output: true Example 2: Input: head = [1,2] Output: false public boolean isPalindrome(ListNode head) { ListNode mid 阅读全文
posted @ 2022-11-27 16:59
MarkLeeBYR
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剑指offer 二叉搜索树的第k个节点 https://www.cnblogs.com/MarkLeeBYR/p/9773509.html 阅读全文
posted @ 2022-11-27 16:47
MarkLeeBYR
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剑指offer https://www.cnblogs.com/MarkLeeBYR/p/9776556.html 阅读全文
posted @ 2022-11-27 16:42
MarkLeeBYR
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参考剑指offer 最小的k个数字 https://www.cnblogs.com/MarkLeeBYR/p/9775091.html 阅读全文
posted @ 2022-11-24 14:42
MarkLeeBYR
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Implement a trie with insert, search, and startsWith methods. Note:You may assume that all inputs are consist of lowercase letters a-z. class TrieNode 阅读全文
posted @ 2022-11-24 10:58
MarkLeeBYR
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剑指offer 反转链表 https://www.cnblogs.com/MarkLeeBYR/p/9773053.html 阅读全文
posted @ 2022-11-24 10:41
MarkLeeBYR
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Given an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the number of islands. An island is surrounded by wa 阅读全文
posted @ 2022-11-24 10:19
MarkLeeBYR
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Given the root of a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bot 阅读全文
posted @ 2022-11-23 23:34
MarkLeeBYR
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给定一个整数数组Arr，求解数组中连续的不相邻元素的和的最大值。例如：对于数组中的元素A1,A2,A3,A4，则需要判断A1+A3,A1+A4,A2+A4中的最大值即为所求。 状态转移方程：dp[i] = max(dp[i - 2], dp[i - 3]) + num[i] 其中，dp[i]表示打劫 阅读全文
posted @ 2022-11-23 23:09
MarkLeeBYR
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