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:
4284 - 8233 + 2781 - 2769 - 5560 + 635 - 1706 + 1965 + 6794

Ex Output:
10377


Ex Input:
6040 + 5815 + 9288 + 5107 + 5697 + 7993 - 672 + 8297

Ex Output:
-35485


Ex Input:
1999 - 5426 - 4765 + 8381 - 5355 - 1081 + 1200

Ex Output:

9045