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: 8552 - 1559 - 9197 - 2232

Output: 21540


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

Output: 6064


Input: Consider Input: 9226 + 6178 - 8812 + 513


Output: 11347