py lab 5

#1
def my_revers(arr):
  n = len(arr)
  for i in range(n//2):
    tmp = arr[i]
    arr[i] = arr[n-i-1]
    arr[n-i-1] = tmp
  return n

a = input().split()
n = my_revers(a)
print(f"New list: {a}")
print(f"List size: {n}")

#2
def f(arr):
  new_a = []
  for i in arr[1::2]:
    new_a.append(i)
  return new_a

a = input().split()
new_a = f(a)

print(f"New list: {new_a}")

#3