comefrom: <doocs>1089.Duplicate Zeros_1.py
code: def duplicateZeros( arr: List[int]) -> None:
      n = len(arr)
      i, k = -1, 0
      while k < n:
          i += 1
          k += 1 if arr[i] else 2
      j = n - 1
      if k == n + 1:
          arr[j] = 0
          i, j = i - 1, j - 1
      while ~j:
          if arr[i] == 0:
              arr[j] = arr[j - 1] = arr[i]
              j -= 1
          else:
              arr[j] = arr[i]
          i, j = i - 1, j - 1
masked: def sample_funcname ( var_0 : List [ int ] ) -> None :
      var_5 = len ( var_0 )
      var_7 , var_9 = - 1 , 0
      while var_9 < var_5 :
          var_7 += 1
          var_9 += 1 if var_0 [ var_7 ] else 2
      var_11 = var_5 - 1
      if var_9 == var_5 + 1 :
          var_0 [ var_11 ] = 0
          var_7 , var_11 = var_7 - 1 , var_11 - 1
      while ~ var_11 :
          if var_0 [ var_7 ] == 0 :
              var_0 [ var_11 ] = var_0 [ var_11 - 1 ] = var_0 [ var_7 ]
              var_11 -= 1
          else :
              var_0 [ var_11 ] = var_0 [ var_7 ]
          var_7 , var_11 = var_7 - 1 , var_11 - 1
  