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: 573 - 2172 + 3067 + 6526 - 4690

Output: -2158


Input: Consider Input: 8025 - 6991 - 3299 + 9670 - 3471

Output: 12116


Input: Consider Input: 2957 - 6306 + 4594 + 2504 - 3862 - 7373 + 7378 + 127 + 7934


Output: -2039