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: 395 - 3060 - 445 + 3450 + 3365

Output: -2915


Input: Consider Input: 1691 - 755 + 5734 - 4774 + 4915 - 7249 - 47

Output: 3867


Input: Consider Input: 1159 + 6957 + 6698 + 7006 - 7206 - 6642 + 3172 + 1589


Output: -10415