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: 9909 - 1362 + 9804 + 5190 + 8223 - 3758
Example Output: -8188

Example Input: 4515 - 2156 - 8427 - 2175
Example Output: 17273

Example Input: 2239 - 9531 - 7656 + 645 - 1084 - 5639
Example Output:
25504