Programming in Python OPPE 1: May 2024, Set 2 (May 2024 term)

Implement the function according to the docstring.

Given three side lengths in the increasing order of length as a, b, and c, where a <= b <= c, check if the given sides are the sides of a right triangle whose perpendicular sides are of even length.

Hint: in a right triangle the square of hypotenuse is the sum of square of the other two sides.

Arguments:

• a: int - the first side length
• b: int - the second side length
• c: int - the hypotenuse length

Return:

• bool - True if the sides form a right triangle and the perpendicular sides are even, else False

Your task

Implement this function:

def is_right_triangle_with_even_sides(a: int, b: int, c: int) -> bool:

Write the function only — the arguments are read for you and the return value is printed automatically.

Arguments arrive as one Python literal per line, in this order: a, b, c.

Example

Input

6
8
10

Output

True

Implement the function according to the docstring.

Given a string, check if all the odd indices are alphabets and the even indices are digits.

Note: indices start from 0.

Arguments:

• string: str - the input string

Return:

• bool - True if all odd indices are alphabets and even indices are digits, else False

Your task

Implement this function:

def is_odd_indices_alpha_and_even_indices_digits(string: str) -> bool:

Write the function only — the arguments are read for you and the return value is printed automatically.

Arguments arrive as one Python literal per line, in this order: string.

Example

Input

'1a2b3c'

Output

True

Implement the function according to the docstring.

Given a list of integers, swap the values at the even indices and the odd indices by modifying the same list.

Arguments:

• l: list - the input list of integers

Return:

• None - the input list is modified inside the function.

Your task

Implement this function:

def swap_even_and_odd_indices(l: list) -> None:

Write the function only — the arguments are read for you and the return value is printed automatically.

Arguments arrive as one Python literal per line, in this order: l.

Example

Input

[1, 2, 3, 4]

Output

[2, 1, 4, 3]