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: 3123 + 9519 - 2864 + 9440 - 756 + 252

Output: -12468


Input: Consider Input: 1562 + 8343 + 8480

Output: -15261


Input: Consider Input: 6930 - 1932 + 5690 - 938 - 342


Output: 4452