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

Example Input: 4117 - 7011 - 9534 - 3901 - 9537 + 6979
Example Output: 27121

Example Input: 4719 - 7049 + 8099 - 957
Example Output:
4626