位运算（2）——Number of 1 Bits

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位运算（3）——Reverse Bits

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[Swift]LeetCode693. 交替位二进制数 | Binary Number with Alternating Bits

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BitMap - leetcode [位运算]

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leetcode 191 Number of 1 Bits(位运算)

Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight). For example, the 32-bit integer ’11' has binary representation 00000000000000000000000000001011, so the function should retu…