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: 8552 - 1559 - 9197 - 2232

Output: 21540


Input: Consider Input: 5299 - 8968 + 5239 + 1119

Output: 7909


Input: Consider Input: 5248 - 3008 + 8146


Output: 110