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: 8294 + 6661 + 4555 + 6171
Example Output: -9093

Example Input: 1471 + 6113 + 3177 - 2507 - 2358 + 6654
Example Output: -9608

Example Input: 3252 - 8243 + 4778 - 9180 - 6820 + 6047 - 7988 - 7750
Example Output:
32408