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: 6439 - 6685 + 6156 - 3314 + 6845 - 6872

Output: 10309


Input: Consider Input: 4854 - 2012 + 5206 - 7285 - 579

Output: 9524


Input: Consider Input: 675 - 421 + 4259 - 223 - 2887 + 3739 + 1998


Output: -5790