inserisci

def Inserisci(L,n1,n2):
#@param L: list of integers
#@param n1: int
#@param n2: int
#@return list of integers

  new_l = L[:]

  if not L.count(n1):
    return L

  else:
    lung = len(L)
    for i in range(lung):
      if L[i] == n1:
        if i+1==lung:
          new_l.append(n2)
        else:
          new_l.insert(i+1,n2)

    return new_l