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:
7208 + 2074 + 2796 - 8783

Ex Output:
11121


Ex Input:
1229 - 4354 + 912 - 1766

Ex Output:
6437


Ex Input:
3832 - 6108 - 2588 - 6073 + 5986

Ex Output:

12615