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: 397 + 1596 + 6102 + 2852 + 1239 + 3524 - 8019

Output: -6897


Input: Consider Input: 3997 - 5279 - 8866 - 8214 - 3538 + 6690 - 4565 + 30

Output: 27739


Input: Consider Input: 9658 - 4098 - 3229 - 4136 + 3026 + 698 - 4465 - 9230 - 2760


Output: 33852