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: 8849 + 869 + 880 + 8843 + 8122
Example Output: -9865

Example Input: 2780 + 8153 - 1592 - 419
Example Output:
-3362