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:
8379 + 6247 - 4435 + 207 - 3793 + 7248 + 1488

Ex Output:
1417


Ex Input:
6020 + 1977 + 708 + 1899 + 3704

Ex Output:
-2268


Ex Input:
1145 - 9371 - 1048 - 2600 - 5206

Ex Output:

19370