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:
6120 - 9271 - 7167 + 6916 - 2510 + 7854 - 7909 - 1960 - 3775

Ex Output:
23942


Ex Input:
1462 + 1045 - 6631 - 4510 + 2234 + 4084 - 6610 + 2698

Ex Output:
9152


Ex Input:
532 - 3030 + 8959 + 4306

Ex Output:

-9703