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: 4287 + 3355 + 4251 + 7433 + 7069

Output: -17821


Input: Consider Input: 4839 - 962 + 7552

Output: -1751


Input: Consider Input: 2836 - 4470 + 4853 + 611 - 5280 - 4246 - 1515 - 9358


Output: 22241