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: 2514 - 3539 - 8491 + 7351 - 1448

Output: 8641


Input: Consider Input: 9885 + 402 + 66 + 4818 + 2654 - 4301 + 2712 + 5842 - 2959

Output: 651


Input: Consider Input: 2548 - 5971 - 3864 - 8847 - 2934 - 2419


Output: 26583