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: 4054 + 5873 - 3926 - 2524 + 5551 - 1721
Example Output: 801

Example Input: 9286 + 9672 + 4184 - 2522
Example Output:
-2048