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:
1260 + 6532 + 3162 + 7255

Ex Output:
-15689


Ex Input:
2226 - 7329 - 3547

Ex Output:
13102


Ex Input:
2794 - 7180 + 2636 - 922 + 7637 + 8106

Ex Output:

-7483