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:
4272 + 6013 - 9409 - 6130 + 9575 + 2198

Ex Output:
2025


Ex Input:
344 + 4107 + 9401 + 4490 - 5191 - 1753 - 5869 + 8385 - 7325

Ex Output:
-5901


Ex Input:
8141 - 343 + 3890 + 5212 - 4287 + 1855

Ex Output:

1814