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: 9864 - 5325 - 3230 - 5129 + 7733 + 3498 - 9250

Output: 21567


Input: Consider Input: 9491 + 8647 - 4571 + 8815 - 4816 - 8552 + 1794

Output: 8174


Input: Consider Input: 9011 - 9454 + 5456


Output: 13009