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: 1922 - 413 - 5668
Example Output: 8003

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

Example Input: 2839 - 7124 + 4191 - 740 + 137
Example Output:
6375