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: 5709 + 8211 + 3945 + 1143 - 7258

Output: -332


Input: Consider Input: 694 + 4432 - 9053

Output: 5315


Input: Consider Input: 2671 + 3943 - 5777 + 7680


Output: -3175