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: 1724 - 4426 - 960 - 8997 - 5797 + 8037 - 7699 + 3023
Example Output: 18543

Example Input: 138 + 3973 - 6085 - 3324 + 6921 + 4411 + 1113 + 8310
Example Output: -15181

Example Input: 4182 - 9856 + 5415 - 5292 + 3496 - 990
Example Output:
11409