三刀

摘要： [题目] You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 阅读全文

摘要： Write a function that takes a string as input and returns the string reversed. Example:Given s = "hello", return "olleh". [题目解析] 这是个非常常见的题目，在面试中命中率极高， 阅读全文

摘要： 题目： 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 hav 阅读全文