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: 155 + 7497 + 4675 - 2329 - 9080 - 5510 - 2336 + 8701
Example Output: -1463

Example Input: 7163 + 3916 + 4926 + 2532 - 2743 - 5389 + 7290
Example Output: -3369

Example Input: 7959 - 360 - 8441 - 9465 + 2793 - 7655 + 5051 + 2276 + 2642
Example Output:
21118