摘要：
Given an integer, write an algorithm to convert it to hexadecimal. For negative integer, two’s complement method is used. Note: 题目标签：Bit Manipulation 阅读全文
摘要：
We define a harmonious array is an array where the difference between its maximum value and its minimum value is exactly 1. Now, given an integer arra 阅读全文
摘要：
Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example:Given a = 1 and b = 2, return 3. 题目标签：Bit Mani 阅读全文