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: 9301 + 1619 - 7459 + 5871 + 2497 + 4093 + 7957 - 1085 - 6698

Output: 2506


Input: Consider Input: 8341 + 2746 - 2959 - 9678 + 5173 + 317

Output: 12742


Input: Consider Input: 641 + 7630 - 2647 - 3575 - 6022


Output: 5255