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:
3069 + 3141 - 6765 + 85 - 9346 + 8391 + 121 + 7644

Ex Output:
-202


Ex Input:
8600 - 7082 + 49 + 8639 - 7036

Ex Output:
14030


Ex Input:
3026 + 6378 + 3204 + 3847 + 452

Ex Output:

-10855