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:
9826 - 5862 + 4973 - 7723 - 8510 + 6631 + 9611 + 1510 + 489

Ex Output:
8707


Ex Input:
9751 - 3599 + 7441 - 2176 + 2662 + 9430 + 8207 + 5927 - 8529

Ex Output:
-9612


Ex Input:
2678 - 5467 + 8355 - 3124 - 5654

Ex Output:

8568