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: 3915 + 4904 + 4887 + 7162 - 3798 + 233 + 1101 - 7758 - 4627

Output: 1811


Input: Consider Input: 7147 + 1234 - 7159 + 8304 - 934 + 3025 - 796 - 5291 - 2549

Output: 11313


Input: Consider Input: 8980 - 6848 - 4370 - 9504 + 9697


Output: 20005