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Given an integer, write an algorithm to convert it to hexadecimal. For negative integer, two’s complement method is used. Note: Example 1: Example 2: 阅读全文
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Reverse bits of a given 32 bits unsigned integer. Example 1: Example 2: Note: Note that in some languages such as Java, there is no unsigned integer t 阅读全文
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Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: Note: You may assume the 阅读全文
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The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Now your job is to find the total 阅读全文
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The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Given two integers x and y, calcul 阅读全文