regis = {0.01, 0.05, 0.10, 0.25, 0.50, 1.00, 2.00, 5.00, 10.00, 20.00, 50.00, 100.00}


def getChange(amount, curr, left):
    if sum(curr) == amount:
        return curr
    elif sum(curr) < amount:
        for x in left:
            res = getChange(amount, curr | {x}, left - {x})
            if len(res) > 0:
                return res
    else:
        return set()

print(getChange(26, set(), regis))