### minimumRefill 
from typing import *
def f_gold(plants: List[int], capacityA: int, capacityB: int) -> int:
    i, j = 0, len(plants) - 1
    ans = 0
    a, b = capacityA, capacityB
    while i <= j:
        if i == j:
            if max(capacityA, capacityB) < plants[i]:
                ans += 1
            break
        if capacityA < plants[i]:
            capacityA = a - plants[i]
            ans += 1
        else:
            capacityA -= plants[i]
        if capacityB < plants[j]:
            capacityB = b - plants[j]
            ans += 1
        else:
            capacityB -= plants[j]
        i += 1
        j -= 1
    return ans