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: 84 - 4898 - 2883 + 5111 - 7812 - 5830 + 3330 + 8500 + 6754

Output: -2188


Input: Consider Input: 6784 + 108 + 6716 - 8239 - 2325 + 7890


Output: 2634