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:
3140 - 7915 + 2559 - 9684 + 4182 - 683 + 7754 + 763 + 4851

Ex Output:
1313


Ex Input:
8379 + 6247 - 4435 + 207 - 3793 + 7248 + 1488

Ex Output:
1417


Ex Input:
441 + 6123 + 8922 - 3238 - 728 + 3724

Ex Output:

-14362