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: 452 - 5631 - 8307 - 1886 + 4631 + 1695 + 4411 - 769

Output: 6308


Input: Consider Input: 1311 + 7420 + 9121 + 7525 - 8582 + 528 + 1094

Output: -15795


Input: Consider Input: 2647 - 3942 + 9178 + 4267


Output: -6856