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: 2537 - 3199 + 5925 + 8172 + 3564 + 8810

Output: -20735


Input: Consider Input: 4264 - 4438 + 3871 + 7585 - 540 - 3455 - 6016

Output: 7257


Input: Consider Input: 4054 + 5873 - 3926 - 2524 + 5551 - 1721


Output: 801