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题目： Given a string s and a string t, check if s is subsequence of t. You may assume that there is only lower case English letters in both s and t. t i 阅读全文
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题目： A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. 阅读全文
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2017年6月 缓存：缓存那些事：https://zhuanlan.zhihu.com/p/27457401 设计模式：Java设计模式（十篇）：https://zhuanlan.zhihu.com/p/25781005 ing... OAuth(用户、客户端、第三方服务 授权框架):理解OAuth 阅读全文
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2017年6月 Immutable.js： (1) 如何用React+Redux+ImmutableJS进行SPA开发：http://yunlaiwu.github.io/blog/2016/12/01/react+redux+immutablejs/ (2) Immutable 详解及 React 阅读全文
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题目： There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it 阅读全文
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题目： Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may co 阅读全文
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题目： Given an array of non-negative integers, you are initially positioned at the first index of the array. Each element in the array represents your m 阅读全文
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题目： Write a program to find the n-th ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 1, 2, 3, 4, 阅读全文
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题目： One way to serialize a binary tree is to use pre-order traversal. When we encounter a non-null node, we record the node's value. If it is a null n 阅读全文
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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 from in f 阅读全文