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:
9824 + 9255 - 8146 - 8393 - 6949 - 3238 + 2641 - 4068 + 4633

Ex Output:
24089


Ex Input:
4139 - 6541 - 2616 + 299 - 700 - 6684

Ex Output:
20381


Ex Input:
936 - 2090 + 4739 - 4913 + 4336

Ex Output:

-1136