1.1 KiB
1.1 KiB
TODO 0191. Number of 1 Bits easy
Given a positive integer n, write a function that returns the number of set bits in its binary representation (also known as the Hamming weight).
Example 1:
Input: n = 11
Output: 3
Explanation:
The input binary string 1011 has a total of three set bits.
Example 2:
Input: n = 128
Output: 1
Explanation:
The input binary string 10000000 has a total of one set bit.
Example 3:
Input: n = 2147483645
Output: 30
Explanation:
The input binary string 1111111111111111111111111111101 has a total of thirty set bits.
Constraints:
1 <= n <= 2^{31} - 1
Follow up: If this function is called many times, how would you optimize it?
TODO Approach
Write your approach here.
TODO Python
class Solution:
def hammingWeight(self, n: int) -> int:TODO C++
class Solution {
public:
int hammingWeight(int n) {
}
};