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.

Input: Consider Input: 4533 - 9566 - 2287 + 4647 + 5056 + 6340 + 777 - 4673 + 2170

Output: 2069


Input: Consider Input: 2848 - 3478 + 9230 + 3585 + 8537 - 3821

Output: -11205


Input: Consider Input: 7990 + 87 + 8583 - 345


Output: -335