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:
2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048

Ex Output:
18149


Ex Input:
526 - 8790 - 6170

Ex Output:

15486