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:
8602 - 1293 - 8063 - 4529 + 453 - 6407

Ex Output:
28441


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

Ex Output:
8007


Ex Input:
5571 + 5729 - 6405 - 526 - 1330

Ex Output:

8103