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: 9050 + 7188 + 3589 + 8762 + 268 + 1995 + 6080 - 4900

Output: -13932


Input: Consider Input: 961 + 1754 - 8392 + 2659 - 495 + 358

Output: 5077


Input: Consider Input: 1009 + 3008 + 5170 + 5314


Output: -12483