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: 2297 + 4208 + 9691 - 6995 + 738 + 1245 - 7806

Output: 1216


Input: Consider Input: 2980 - 6793 - 1879 + 5728 - 4199

Output: 10123


Input: Consider Input: 2724 + 8119 + 1049 + 9004


Output: -15448