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: 1953 - 3854 - 1362 + 6267 - 3664 - 901 + 7969 + 111
Example Output: -2613

Example Input: 812 + 6106 - 2904 + 7738 + 7655 - 6987
Example Output: -10796

Example Input: 4284 - 7547 - 4478 - 3941 + 9791 - 3691 + 6936
Example Output:
7214