# 1248. Count Number of Nice Subarrays
"""
given an array of integers 'nums' and an integers 'k'. a continuous subarray
is called nice if there are 'k' odd numbers on it. return the number of nice
subarrays.
"""
class Solution(object):
def numberOfSubarrays(self, nums, k):
"""
:type nums: List[int]
:type k: int
:rtype: int
"""
i, cnt, ans = 0, 0, 0
for j in range(len(nums)):
if nums[j] & 1:
k -= 1
cnt = 0
while k == 0:
k += nums[i] & 1
i += 1
cnt += 1
ans += cnt
return ans
if __name__ == "__main__":
obj = Solution()
print(obj.numberOfSubarrays(nums=[1, 1, 2, 1, 1], k=3))
print(obj.numberOfSubarrays(nums=[2, 4, 6], k=1))
print(obj.numberOfSubarrays(nums=[2, 2, 2, 1, 2, 2, 1, 2, 2, 2], k=2))
