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: 1943 + 6084 + 8719 + 2400 + 8595 - 7077 + 1264

Output: -18042


Input: Consider Input: 3438 - 3865 - 956 - 3020 + 2696

Output: 8583


Input: Consider Input: 8539 - 6592 - 7022 + 9420 - 6659 + 6795 - 4788


Output: 17385