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:
8802 - 6452 - 1721 - 4775 + 1838 + 4933 + 9964 - 6909

Ex Output:
11924


Ex Input:
1971 - 5591 + 4038 + 5571

Ex Output:
-2047


Ex Input:
9419 - 965 + 5184 - 9578 + 7635 + 1576 + 914

Ex Output:

4653