comefrom: <doocs>1137.N-th Tribonacci Number_1.py
code: def tribonacci( n: int) -> int:
      a, b, c = 0, 1, 1
      for _ in range(n):
          a, b, c = b, c, a + b + c
      return a
masked: def sample_funcname ( var_0 : int ) -> int :
      var_3 , var_5 , var_6 = 0 , 1 , 1
      for var_8 in range ( var_0 ) :
          var_3 , var_5 , var_6 = var_5 , var_6 , var_3 + var_5 + var_6
      return var_3
  