Interview Classic 150 Questions P191 Number of 1 Bits

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Timeline

timeline

2025-11-25

init

__builtin_popcount

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Title:

P191 bit1count

https://leetcode.cn/problems/number-of-1-bits/description/?envType=study-plan-v2&envId=top-interview-150

can directly use built-in function__builtin_popcount

class Solution {
    public:
	int hammingWeight(int n)
	{
		return __builtin_popcount(n);
	}
};