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: 6492 - 3901 + 3666 + 9196 - 3917 - 133
Example Output: 1581

Example Input: 3915 + 4904 + 4887 + 7162 - 3798 + 233 + 1101 - 7758 - 4627
Example Output: 1811

Example Input: 4766 + 7713 - 9881 + 2292
Example Output:
4642