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: 5270 - 8957 + 6318 - 3390

Output: 11299


Input: Consider Input: 9350 + 2320 + 5626 - 4349

Output: 5753


Input: Consider Input: 7087 + 5555 + 5110 - 5180 - 2968


Output: 4570