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: 2078 + 3891 + 2060

Output: -3873


Input: Consider Input: 961 + 1754 - 8392 + 2659 - 495 + 358

Output: 5077


Input: Consider Input: 7888 + 8249 - 1851 - 4622 + 806 + 5603 - 2709 - 6155 + 8553


Output: 14