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: 2078 + 3891 + 2060
Example Output: -3873

Example Input: 2367 + 2751 + 138 + 6347 + 5297
Example Output: -12166

Example Input: 7020 - 499 + 3304 - 3502 - 907 + 8217
Example Output:
407