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题目描述 Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example, Given n = 3, your program should retu 阅读全文
2021年6月13日
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题目描述 Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. /** * Definition for singly-linked 阅读全文
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题目描述 Given an array where elements are sorted in ascending order,convert it to a height balanced BST. /** * Definition for binary tree * struct TreeNo 阅读全文
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题目描述 Given inorder and postorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. /** * 阅读全文
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题目描述 Given preorder and inorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. /** * D 阅读全文
2021年6月12日
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题目描述 Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers can be arbitrarily large and are no 阅读全文
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题目描述 将一个给定字符串根据给定的行数，以从上往下、从左到右进行 Z 字形排列。比如输入字符串为 "LEETCODEISHIRING" 行数为 3 时，排列如下： L C I R E T O E S I I G E D H N 之后，你的输出需要从左往右逐行读取，产生出一个新的字符串，比如："LC 阅读全文
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题目描述 Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. /** 阅读全文
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题目描述 Given a list, rotate the list to the right by k places, where k is non-negative. For example: Given 1->2->3->4->5->NULL and k =2,return 4->5->1-> 阅读全文
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题目描述 Given a linked list, remove the n th node from the end of list and return its head. For example, Given linked list: 1->2->3->4->5, and n = 2. Aft 阅读全文