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:
6681 - 1947 - 955 + 9470 - 4512 - 9603 + 5822 + 9404 - 8896

Ex Output:
7898


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

Ex Output:
18149


Ex Input:
6005 - 5301 - 4918 - 8193 - 864

Ex Output:

25281