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: 8213 + 7145 + 5203 - 2621 + 1654 - 1844
Example Output: -1324

Example Input: 9982 + 267 - 3418 + 8741 - 63 - 1771 + 4720
Example Output: 1506

Example Input: 9144 - 8724 + 9433 - 6373 + 5640 - 9033 + 2000 - 151 - 3905
Example Output:
20257