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: 2432 + 588 - 6240 + 8670

Output: -586


Input: Consider Input: 365 + 3086 - 9118 - 8101 + 6550 + 80 - 1897 - 1498 - 8498

Output: 19761


Input: Consider Input: 6370 + 5221 + 8477 + 53


Output: -7381