isanka.py

#!/bin/env python
# python3.6 filename

def solution(A):
  out_of_order_count = 0
  existing_hights = A
  sorted_hights = sorted(A)

  i = 0
  j = 0
  for tree in existing_hights:
    if j < len(existing_hights):
      print(existing_hights[i], sorted_hights[j])
      if sorted_hights[i] == existing_hights[j]:
        pass
      else:
        j = j + 1
        out_of_order_count = out_of_order_count + 1
      i = i + 1
      j = j + 1

  if out_of_order_count < 2:
    print("OK")
    return 0
  else:
    print("Nops")
    print(out_of_order_count)
    return out_of_order_count

solution([2,3,5,4])
solution([4,5,2,3,4])