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: 6178 - 1637 - 8197 - 6437 + 4591 - 6995 + 3562 + 9474
Example Output: 11817

Example Input: 8666 + 80 + 2370 - 4680 - 3944 + 3621 + 4402 - 5171
Example Output: 11988

Example Input: 519 - 9471 - 7173 - 34 - 5123 + 9104 - 2340 + 7208 - 3693
Example Output:
12041