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: 6570 + 2902 + 9219 - 6971 + 6886 + 765

Output: -6231


Input: Consider Input: 318 - 2977 - 9352 - 3082 - 5224 + 3028 - 7022

Output: 24947


Input: Consider Input: 2020 + 862 - 5780


Output: 6938