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:
1011 - 5404 + 4286 - 549 - 4178 - 1559

Ex Output:
8415


Ex Input:
9485 + 6349 - 1527 - 4730 - 5865 + 851 - 7415 - 3548 + 2868

Ex Output:
22502


Ex Input:
2611 + 6783 + 8407 - 5813 + 4138

Ex Output:

-10904