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:
981 + 3338 + 96 + 3479 + 574 + 2567 + 3009 + 2356 - 4663

Ex Output:
-9775


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

Ex Output:
8415


Ex Input:
2315 - 9223 + 3977 - 6500 + 7426 + 4887

Ex Output:

1748