def pyramid(param:int):
    result = []
    for i in range(param):
        arrrrrrrrrrrrrrrrrrrrrrrrr=[]
        for f in range(param-i):
            arrrrrrrrrrrrrrrrrrrrrrrrr.append(1)
        result.append(arrrrrrrrrrrrrrrrrrrrrrrrr)

    result.reverse()
    return result

    print(pyramid(0))
    print(pyramid(1))
    print(pyramid(2))
    print(pyramid(3))
    print(pyramid(4))