lc209

class Solution:
    def minSubArrayLen(self, target: int, nums: List[int]) -> int:
        minsubl = 1e6
        s, f = 0, 0
        sumfs = 0
        for f in range(len(nums)):
            sumfs += nums[f]
            while sumfs >= target:
                subl = f - s +1
                if subl < minsubl:
                    minsubl = subl
                sumfs -= nums[s]
                s += 1
        return minsubl if minsubl != 1e6 else 0