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: 136 + 9772 - 2848 - 4980 + 6156 - 883 + 5407 + 3211

Output: -15699


Input: Consider Input: 4148 + 9216 - 5756 - 5558 + 2801 - 7501 + 1939 + 3102 + 6894

Output: -989


Input: Consider Input: 3036 - 4765 + 5985 + 2440


Output: -624