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:
2969 - 5770 - 665 + 516 - 1172 + 4904 - 384

Ex Output:
5540


Ex Input:
7337 + 5801 - 8640 - 4143 - 2557

Ex Output:
16876


Ex Input:
5317 - 2260 + 3883 + 9121 + 6723 + 9677 + 214

Ex Output:

-22041