cube = lambda x:x**3 # complete the lambda function 

def fibonacci(n):
    # return a list of fibonacci numbers
    if n == 0:
        return []
    elif n == 1:
        return [0]
    else:
        fib = [0, 1]
        for i in range(2, n):
            fib.append(fib[i - 1] + fib[i - 2])
        return fib