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:
5394 + 9787 - 7151 - 4774 - 6995 + 6101 - 1317

Ex Output:
9743


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

Ex Output:
16140


Ex Input:
4545 + 7250 + 4507 + 8786 - 5757

Ex Output:

-10241