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: 2181 + 397 + 8824 - 2945 + 612 + 9971 + 1036 - 7693
Example Output: -8021

Example Input: 7320 + 9337 - 31 + 8850 + 4804 + 230 - 9287 - 4572
Example Output: -2011

Example Input: 383 - 4519 + 2901
Example Output:
2001