'''

5248->1248. Count Number of Nice Subarrays
Difficulty: Medium
Given an array of integers nums and an integer k.

A subarray is called nice if there are k odd numbers on it.

Return the number of nice sub-arrays.



Example 1:

Input: nums = [1,1,2,1,1], k = 3
Output: 2
Explanation: The only sub-arrays with 3 odd numbers are [1,1,2,1] and [1,2,1,1].
Example 2:

Input: nums = [2,4,6], k = 1
Output: 0
Explanation: There is no odd numbers in the array.
Example 3:

Input: nums = [2,2,2,1,2,2,1,2,2,2], k = 2
Output: 16


Constraints:

1 <= nums.length <= 50000
1 <= nums[i] <= 10^5
1 <= k <= nums.length


'''

class Solution(object):
    def numberOfSubarrays(self, nums, k):
        """
        :type nums: List[int]
        :type k: int
        :rtype: int
        """
