摘要：
题目描述 Write a function that adds two numbers. You should not use + or any arithmetic operators. Note: a and b may be 0 or negative. The result fits in 阅读全文
摘要：
题目描述 Imagine you are reading in a stream of integers. Periodically, you wish to be able to look up the rank of a number x (the number of values less t 阅读全文