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: 3881 + 3747 + 6493 - 7538

Output: 1179


Input: Consider Input: 509 + 4840 + 5618 + 9163 + 802

Output: -19914


Input: Consider Input: 6265 + 6346 + 5512 - 1965 + 5300


Output: -8928