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:
8967 + 529 - 1163 - 2651 + 7174 - 2929

Ex Output:
8007


Ex Input:
2131 + 4513 + 3760 - 9342 + 7779 + 4653 + 3111

Ex Output:
-12343


Ex Input:
417 + 1727 + 8325

Ex Output:

-9635