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:
9909 - 1362 + 9804 + 5190 + 8223 - 3758

Ex Output:
-8188


Ex Input:
2178 - 6447 + 5843 + 9653 + 4633 - 5887 + 8815 - 6635 + 178

Ex Output:
-7975


Ex Input:
1679 - 3014 + 1510 - 7712 - 7126 + 2292 + 2952

Ex Output:

12777