Classic 150 Interview Questions P191 Number of 1 Bits

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Timeline

Timeline

2025-11-25

init

__builtin_popcount

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Problem:

P191 bit1the number of

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

You can directly use built-in functions.__builtin_popcount

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