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: 6368 + 9565 - 7042 - 1940 - 9960

Output: 15745


Input: Consider Input: 4117 - 7011 - 9534 - 3901 - 9537 + 6979

Output: 27121


Input: Consider Input: 313 - 9730 + 161 - 6771 + 5496 - 743


Output: 11900