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:
2443 + 7109 + 4711

Ex Output:
-9377


Ex Input:
5125 - 607 + 8597 + 4804 + 5962 - 7812 - 176 - 9436 + 6198

Ex Output:
-2405


Ex Input:
65 - 7178 + 5117 - 2272 - 6361

Ex Output:

10759