713. Subarray Product Less Than K

Example 1

Input: nums = [10,5,2,6], k = 100
Output: 8
Explanation: The 8 subarrays that have product less than 100 are:
[10], [5], [2], [6], [10, 5], [5, 2], [2, 6], [5, 2, 6]
Note that [10, 5, 2] is not included as the product of 100 is not strictly less than k.

Example 2

Input: nums = [1,2,3], k = 0
Output: 0

조건

1 <= nums.length <= 3 * 104
1 <= nums[i] <= 1000
0 <= k <= 106

class Solution:
    def numSubarrayProductLessThanK(self, nums: List[int], k: int) -> int:
        l, r, answer = 0, 0, 0
        product = 1
        if k <= 1:
            return 0
        
        while r < len(nums):
            
            product *= nums[r]
            while product >= k:
                product /= nums[l]
                l += 1
            answer += r - l + 1
            r += 1
            print(product,r, l, answer)
            
        return answer