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: 4495 + 1180 - 7554 - 4842
Example Output: 15711

Example Input: 7344 + 9206 + 3989 + 5648 - 7620
Example Output: -3879

Example Input: 7978 - 9907 - 6447 + 5619 - 5206 - 7622 + 5437 - 5807
Example Output:
31911