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:
3254 - 200 + 4450 - 6393 - 2480 + 4564 + 9650

Ex Output:
-6337


Ex Input:
5462 - 3916 + 9462 - 8867 - 7357

Ex Output:
16140


Ex Input:
8036 - 7869 - 4052 - 8759 + 2504 + 178 - 3683 + 8303 - 7066

Ex Output:

28480