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:
1256 - 3248 - 3709 - 3019

Ex Output:
11232


Ex Input:
597 + 4303 + 4507 + 4779 - 8079

Ex Output:
-4913


Ex Input:
2599 + 1451 - 8624 - 9656 - 2020 + 4351 - 6842 - 8952 + 8496

Ex Output:

24395