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

Ex Output:
-22925


Ex Input:
4062 - 644 + 187 - 4501 + 1736 - 230

Ex Output:
7514


Ex Input:
8604 + 6941 + 1385 + 272 + 6133

Ex Output:

-6127