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: 1860 - 6675 + 8615 + 485 + 6302 - 3385 + 1568

Output: -5050


Input: Consider Input: 397 + 1596 + 6102 + 2852 + 1239 + 3524 - 8019

Output: -6897


Input: Consider Input: 4491 - 4310 + 8455 - 9957 + 1883 + 4228 + 3898


Output: 294