10-week-algorithm-excercise-master/Week_08/338/counting_bits2.py

from typing import List


class Solution:
    def countBits(self, num: int) -> List[int]:
        res = [0] * (num + 1)
        for i in range(1, num + 1):
            res[i] = res[i & (i-1)] + 1
        return res