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:
7671 - 2300 - 9650 - 6692 + 7656 + 4940 - 2878 - 5602 + 7222

Ex Output:
14975


Ex Input:
8802 - 6452 - 1721 - 4775 + 1838 + 4933 + 9964 - 6909

Ex Output:
11924


Ex Input:
7780 - 4822 + 5001 - 3717 - 3260

Ex Output:

14578