LeetCode Number of 1 Bits
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Number of 1 Bits Total Accepted: 10567 Total Submissions: 28552 My Submissions Question Solution
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.
意思就是求二进制中1的个数:
class Solution {public: int hammingWeight(uint32_t n) { int count=0; while(n&-n) { n-=(n&-n); count++; } return count; }};
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