In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Ex Input:
7270 + 4138 - 1696 - 5719 - 9735 + 2360

Ex Output:
17922


Ex Input:
6063 + 9874 + 5939 - 5013 + 791

Ex Output:
-5528


Ex Input:
7844 - 18 - 4929 + 3074

Ex Output:

9717