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: 4139 - 6541 - 2616 + 299 - 700 - 6684
Example Output: 20381

Example Input: 5945 + 1046 + 9187 + 929
Example Output: -5217

Example Input: 7472 + 6134 - 9315 + 3730 - 5063
Example Output:
11986