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:
1320 + 3923 - 1080 - 3521 - 8998 + 4479 - 2559 - 7680

Ex Output:
16756


Ex Input:
4810 - 7988 + 5646 + 8226 + 5009 - 1013 + 7246 - 4319 - 1934

Ex Output:
-6063


Ex Input:
2804 - 9287 + 152 + 1324 + 1324 + 8577 - 1472 + 6154

Ex Output:

-3968