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: 5444 + 2542 - 6861 + 2740 - 4508 + 478 - 1138 + 7229
Example Output: 4962

Example Input: 242 - 3824 + 6718 - 4276 + 8975
Example Output: -7351

Example Input: 8771 + 2575 - 7914 - 3691
Example Output:
17801