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: 4203 - 2197 - 5419 - 9369 + 4447 - 2386 - 94

Output: 19221


Input: Consider Input: 2458 + 4195 - 6382

Output: 4645


Input: Consider Input: 7613 - 9439 - 2956 - 3427 + 7958


Output: 15477