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: 5355 + 1451 - 3895 + 6213 + 743

Output: 843


Input: Consider Input: 240 - 438 + 497 - 5901 - 1960 + 4782 + 6400 - 4055

Output: 915


Input: Consider Input: 5394 + 9787 - 7151 - 4774 - 6995 + 6101 - 1317


Output: 9743