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: 597 + 4303 + 4507 + 4779 - 8079
Example Output: -4913

Example Input: 2480 - 8716 + 5571 - 504 - 4905 - 392 - 5105 + 906
Example Output: 15625

Example Input: 7467 + 1929 + 4171
Example Output:
1367