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.

Example Input: 1137 - 2413 - 5470 - 9797 + 2566
Example Output: 16251

Example Input: 9001 + 6216 - 1478 + 5475 - 8693 - 3911 - 319 + 4768 - 320
Example Output: 7263

Example Input: 1296 + 9756 + 2493 + 9940 - 5147 - 5428 - 5741 - 828
Example Output:
-3749