摘要：Given a non negative integer number num. For every numbers i in the range 0 ≤ i ≤ num calculate the number of 1's in their binary representation and r 阅读全文

摘要：Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in binary as 00000010100101000001111010011100), retur 阅读全文

摘要：Divide two integers without using multiplication, division and mod operator. If it is overflow, return MAX_INT. 1. nagitive 2. overflow Another exampl 阅读全文

摘要：Given an integer, write an algorithm to convert it to hexadecimal. For negative integer, two’s complementmethod is used. Note: Example 1: Example 2: 阅读全文

摘要：The gray code is a binary numeral system where two successive values differ in only one bit. Given a non-negative integer n representing the total num 阅读全文