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:
2178 - 6447 + 5843 + 9653 + 4633 - 5887 + 8815 - 6635 + 178

Ex Output:
-7975


Ex Input:
3428 - 8444 - 2270 - 3241 - 1368 - 8884 - 6840 - 5265

Ex Output:
39740


Ex Input:
4540 - 7206 + 4552

Ex Output:

7194