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:
9060 + 6995 - 9090 + 8450 - 5246 + 5012

Ex Output:
2939


Ex Input:
9237 + 5388 - 46 + 2616 + 8227 - 3578 - 5065 + 1176

Ex Output:
519


Ex Input:
5272 + 8198 - 8857 + 3919 - 2898 - 8618

Ex Output:

13528