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:
6108 + 6734 + 3016 + 637 - 2671 - 5486 - 1133 + 1713 - 2180

Ex Output:
5478


Ex Input:
1837 - 6362 - 226

Ex Output:
8425


Ex Input:
1718 - 8860 - 9652

Ex Output:

20230