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: 2500 + 3268 - 574 + 5695 - 2143 + 404 - 196
Example Output: -3954

Example Input: 1884 + 3670 - 3893 + 782 + 3288 - 7463 + 3214
Example Output: 2286

Example Input: 3046 + 4504 + 641 + 1752 + 8737 - 8560 - 6381 - 2520 - 6564
Example Output:
11437