while(True):

    a, b, c, x, y = list(map(int, input().split()))
    res = a * x + b * y
    for i in range(1, max(x, y) + 1):
        res = min(res, a * max(x - i, 0) + b * max(y - i, 0) + 2 * c * i)
    print(res)