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:
9616 - 8145 + 562 + 3160 - 8906 - 360 + 9291 + 7609 + 460

Ex Output:
5945


Ex Input:
8671 + 9945 - 8465 - 5276 + 1447

Ex Output:
11020


Ex Input:
4792 + 2910 + 8341 - 4744 + 6465 - 977 - 4204

Ex Output:

-2999