摘要： You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single 阅读全文

摘要： Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex 阅读全文

摘要： 委托：存储函数引用类型 返回类型 和 参数 一致 为什么不判断参数传入而选择不同函数方法，而非要delegate呢 还要new一个新的delegate类... 阅读全文