def fibonacciIterative(n):
  k1 = 0
  k2 = 1
  for i in range(n - 1):
    previousK2 = k2
    k2 = k1 + k2
    k1 = previousK2
  return k1


fibonacciSum = lambda n: sum([fibonacciIterative(i) for i in range(1, n + 1)])
fibonacciList = lambda n: [fibonacciIterative(i) for i in range(1, n + 1)]

if __name__ == "__main__":
  n = int(input('n: '))

  print(f'a) Fibonacci({n})', fibonacciIterative(n))
  print(f'b) Sum av Fibonacci(1..{n})', fibonacciSum(n))
  print(f'c) Sum av Fibonacci(1..{n})', fibonacciList(n))