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: 3421 - 71 + 7643 - 8661 + 520 - 6536 + 9411
Example Output: 1115

Example Input: 5161 + 8791 + 9352 + 7272 + 935 + 8632 + 1201
Example Output: -31022

Example Input: 7525 + 263 - 1634 + 3644 + 6905 - 167
Example Output:
-1486