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: 4226 - 3951 + 2613
Example Output: 5564

Example Input: 6681 - 1947 - 955 + 9470 - 4512 - 9603 + 5822 + 9404 - 8896
Example Output: 7898

Example Input: 5823 - 92 + 6807 + 3095 + 6911
Example Output:
-10898