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:
4203 - 2197 - 5419 - 9369 + 4447 - 2386 - 94

Ex Output:
19221


Ex Input:
3664 - 184 - 3835 + 2124 - 1567 - 8341 - 3628 - 8279

Ex Output:
27374


Ex Input:
7932 + 8619 + 7212 + 8529

Ex Output:

-16428