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: 3438 - 3865 - 956 - 3020 + 2696
Example Output: 8583

Example Input: 397 + 1596 + 6102 + 2852 + 1239 + 3524 - 8019
Example Output: -6897

Example Input: 3305 + 3659 + 4898 + 7083
Example Output:
-12335