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: 5709 + 8211 + 3945 + 1143 - 7258

Output: -332


Input: Consider Input: 799 + 9104 - 2060 - 779 + 5546 - 9608 + 4006 + 8557 - 3643

Output: -10324


Input: Consider Input: 3966 - 1235 + 5287 + 2415 + 4017


Output: -6518