0209-minimum-size-subarray-sum.py

class Solution:
    def minSubArrayLen(self, target: int, nums: List[int]) -> int:
        res = float('inf')
        l, total = 0, 0

        for r in range(len(nums)):
            total += nums[r]
            while total >= target:
                res = min(res, r - l + 1)
                total -= nums[l]
                l += 1
        return res if res != float('inf') else 0