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: 1616 - 440 + 11
Example Output: 2045

Example Input: 8341 + 2746 - 2959 - 9678 + 5173 + 317
Example Output: 12742

Example Input: 3619 + 5149 + 1127 - 6238
Example Output:
3581