BYRHuangQiang

摘要： # 1 题目> Implement the following operations of a stack using queues.- push(x) -- Push element x onto stack.- pop() -- Removes the element on top of the... 阅读全文

摘要： # 1 题目> Implement the following operations of a queue using stacks.- push(x) -- Push element x to the back of queue.- pop() -- Removes the element fro... 阅读全文

摘要： # 1 题目Invert a binary tree.``` 4 / \ 2 7 / \ / \1 3 6 9```to``` 4 / \ 7 2 / \ / \9 6 3 1```**接口**: `public TreeN... 阅读全文

摘要： # 1 题目> Given an integer, write a function to determine if it is a power of two.**接口** `boolean isPowerOfTwo(int n) `# 2 思路判断一个整数是否是2的幂次结果数。> 0100 ==>... 阅读全文

摘要： 单链表反转--递归非递归实现`Java`接口: ` ListNode reverseList(ListNode head) `## 非递归的实现有2种，[参考](http://www.cnblogs.com/byrhuangqiang/p/4311336.html) - 头结点插入法 - 就地反转#... 阅读全文

摘要： 1 题目All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful... 阅读全文

摘要： 1 题目Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as theHamming weight).For example, the 32-bi... 阅读全文

摘要： 1 题目Reverse bits of a given 32 bits unsigned integer.For example, given input 43261596 (represented in binary as00000010100101000001111010011100), ret... 阅读全文

摘要： 1 题目Implement regular expression matching with support for'.'and'*'.'.' Matches any single character.'*' Matches zero or more of the preceding element... 阅读全文

摘要： 1 题目Given a sorted linked list, delete all nodes that have duplicate numbers, leaving onlydistinctnumbers from the original list.For example,Given1->2... 阅读全文