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:
4224 - 9761 - 8262 + 6568 - 5026 + 916 - 5225 - 2454 - 1897

Ex Output:
29365


Ex Input:
4839 - 962 + 7552

Ex Output:
-1751


Ex Input:
8979 - 7610 + 7490 + 475

Ex Output:

8624