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:
9909 - 1362 + 9804 + 5190 + 8223 - 3758

Ex Output:
-8188


Ex Input:
8849 + 869 + 880 + 8843 + 8122

Ex Output:
-9865


Ex Input:
5174 - 1354 + 3249

Ex Output:

3279