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: 1259 - 2367 + 9919 + 7196 + 4121
Example Output: -17610

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

Example Input: 5558 + 7937 - 3305 + 4066 - 5624 + 6847
Example Output:
-4363