# basic linked list in python

class Node:
    def __init__(self, value=None, next=None):
        self.value = value
        self.next = next

class LinkedList:
    def __init__(self, head=None):
        if not head:
            self.head = Node()

# and other attributes can be added.


				
			

print("hello world")


				
			

print("hi there")
				
			

# one liner fibonacci function to generate a list of fib numbers in O(n) time
# obviously uses the walrus operator so valid from python3.8

fib = lambda n: (lambda n, l: ( [l.__setitem__(i,(l[i-2] + l[i-1])) for i in range(2, n)]))(n, l:=[0,1]+[0]*(n-2)) and l

print(fib(50))

# :)