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: 7930 - 2835 - 1925 - 6613

Output: 19303


Input: Consider Input: 6355 - 3589 + 7310 - 5161 + 9803

Output: -2008


Input: Consider Input: 3988 + 5748 + 8912 - 5267 + 8599 - 3500 + 5149


Output: -15653