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:
5342 - 6456 - 9929 + 3119 - 1242 + 314

Ex Output:
19536


Ex Input:
9491 + 8647 - 4571 + 8815 - 4816 - 8552 + 1794

Ex Output:
8174


Ex Input:
4899 + 5775 - 8386 + 4273

Ex Output:

3237