leetcode191[easy]---Number of 1 Bits
2017-12-06 16:25
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难度：easy
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
so the function should return 3.
思路：输入一个十进制的数，转化为二进制，然后数一数里面有几个1.
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 return 3.
思路：输入一个十进制的数，转化为二进制，然后数一数里面有几个1.
191. Number of 1 Bits
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