comefrom: <doocs>1346.Check If N and Its Double Exist_1.py
code: def checkIfExist( arr: List[int]) -> bool:
      m = {v: i for i, v in enumerate(arr)}
      return any(v << 1 in m and m[v << 1] != i for i, v in enumerate(arr))
masked: def sample_funcname ( var_0 : List [ int ] ) -> bool :
      var_7 = { var_4 : var_5 for var_5 , var_4 in enumerate ( var_0 ) }
      return any ( var_4 << 1 in var_7 and var_7 [ var_4 << 1 ] != var_5 for var_5 , var_4 in enumerate ( var_0 ) )
  