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: 694 + 4432 - 9053
Example Output: 5315

Example Input: 4062 - 644 + 187 - 4501 + 1736 - 230
Example Output: 7514

Example Input: 2678 + 7485 - 7201 + 772
Example Output:
1622