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: 1673 - 3914 + 8016 + 5937 - 8915 + 4818

Output: -4269


Input: Consider Input: 694 + 4432 - 9053

Output: 5315


Input: Consider Input: 3038 + 154 + 7957 + 3402


Output: -8475