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:
5989 - 6394 + 3845 + 1679 - 5682 + 8226 - 674 - 1284

Ex Output:
6273


Ex Input:
4117 - 3380 - 4784

Ex Output:
12281


Ex Input:
5226 + 5141 - 2127 - 891

Ex Output:

3103