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: 6570 + 2902 + 9219 - 6971 + 6886 + 765

Output: -6231


Input: Consider Input: 9731 - 5427 + 606 + 9242 - 5166 + 659 + 5124 + 2482 - 2031


Output: 4242