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:
23 - 7991 - 1064 + 8364

Ex Output:
714


Ex Input:
8157 - 2717 - 1214 + 8558 + 7391 - 7163 + 6203 - 6912

Ex Output:
4011


Ex Input:
7961 - 5474 + 4234 - 4358 - 7627 - 2291 - 9771 + 9867 - 813

Ex Output:

24194