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: 3709 + 206 - 4363 + 3129 + 2506
Example Output: 2231

Example Input: 7961 - 5474 + 4234 - 4358 - 7627 - 2291 - 9771 + 9867 - 813
Example Output: 24194

Example Input: 3201 - 331 + 6939 + 3306 - 258 - 1 + 2226 - 1466 - 2924
Example Output:
-4290