摘要：Determine the number of bits required to flip if you want to convert integer n to integer m. Both n and m are 32-bit integers. Determine the number of 阅读全文

摘要：Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. Given a m x n matrix, if an element is 0, set its entire 阅读全文

摘要：Write a function that add two numbers A and B. You should not use + or any arithmetic operators. There is no need to read data from standard input str 阅读全文