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: 597 + 4303 + 4507 + 4779 - 8079

Output: -4913


Input: Consider Input: 2837 + 8737 + 9015 - 7647 - 1903 - 3427 - 2034 - 3680 - 8565

Output: 12341


Input: Consider Input: 8757 - 7923 - 3177 - 1623 + 5084 - 1190 - 119


Output: 17705