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:
4274 - 4385 - 2316 - 7783

Ex Output:
18758


Ex Input:
7533 + 2213 - 7566 + 455 - 6321 - 2480 + 1023 + 2407

Ex Output:
17802


Ex Input:
5049 + 7409 + 3167 + 3700 - 2660

Ex Output:

-6567