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

Example Input: 7149 - 7250 - 2026 - 4929 - 5525 + 1967 + 895 + 4245 - 720
Example Output: 20492

Example Input: 6140 - 8997 - 6967 + 7189
Example Output:
14915