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: 2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048
Example Output: 18149

Example Input: 5113 - 8987 - 452
Example Output: 14552

Example Input: 169 + 4940 + 7593 - 4532 + 2433 - 9730 - 6448 - 3026 - 2882
Example Output:
11821