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: 4899 + 5775 - 8386 + 4273
Example Output: 3237

Example Input: 4486 + 7884 - 172 + 2615
Example Output: -5841

Example Input: 3838 - 1008 + 7623 + 2321 - 8116 + 8156
Example Output:
-5138