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:
7930 - 2835 - 1925 - 6613

Ex Output:
19303


Ex Input:
1278 + 4628 + 2357 + 3694 + 5775 + 8542 - 793

Ex Output:
-22925


Ex Input:
271 - 676 + 4308 - 4228 - 1426 + 841 - 8240 + 3918

Ex Output:

5774