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: 569 + 2078 + 2757 - 9211
Example Output: 4945

Example Input: 9806 + 3365 + 4506 + 7148 - 8080 + 5035 + 2028 + 7278
Example Output: -11474

Example Input: 9713 + 8053 - 1782 + 6126 + 5918 + 968 - 2071 - 879 + 558
Example Output:
-7178