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: 452 - 5631 - 8307 - 1886 + 4631 + 1695 + 4411 - 769

Output: 6308


Input: Consider Input: 4117 - 3380 - 4784

Output: 12281


Input: Consider Input: 9047 + 8136 + 6430 - 7892 - 5003 - 3893 - 6210 + 8335


Output: 9144