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: 7525 + 263 - 1634 + 3644 + 6905 - 167

Output: -1486


Input: Consider Input: 2603 + 1868 - 4242

Output: 4977


Input: Consider Input: 2280 + 7961 + 1749 - 4845 - 1649 - 7323 - 4137


Output: 10524