Fifteen puzzle solvability, Numworks Python

[stored]

Without "99" you can get a bit simpler code:

Code:


def fifteen(a):
  b = 0
  for i in range(15):
    for j in range(i+1, 16):
      b += a[j] < a[i]
  return b


a = [11,0,3,8,1,6,15,10,7,14,2,13,4,12,9,5]
print(fifteen(a))  # 52