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: 9240 - 5321 + 7584 - 9605 + 9674 - 5556 + 6400

Output: 6064


Input: Consider Input: 8135 - 2883 + 7793 - 4176

Output: 7401


Input: Consider Input: 2340 - 8760 - 6946 - 8197 - 2699


Output: 28942