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: 6815 - 396 - 2187 + 8526 + 1176 - 7273 - 9622

Output: 16591


Input: Consider Input: 7169 + 1918 - 7501 + 5160 + 9033 - 3341 + 4286

Output: -2386


Input: Consider Input: 553 - 731 - 4822 + 7571 - 1401


Output: -64