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: 1971 - 5591 + 4038 + 5571
Example Output: -2047

Example Input: 5753 - 4358 + 6312 + 2406 + 5334 - 4718 + 6262
Example Output: -5485

Example Input: 8591 - 3830 - 9895
Example Output:
22316