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

Output: 801


Input: Consider Input: 6946 + 6834 - 1169 + 9756 + 2063 - 4750 - 425 + 1121 + 8155

Output: -14639


Input: Consider Input: 8465 + 1742 + 7199


Output: -476