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:
555 + 1174 + 4465 + 6452 + 3211 + 2960 - 856 + 4997 - 9930

Ex Output:
-11918


Ex Input:
1834 - 2630 + 3119 - 3024 - 1805 + 5287 + 9826

Ex Output:
-8939


Ex Input:
2120 - 834 - 6148 + 325 - 2925 - 7003 - 5057

Ex Output:

23762