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: 8301 - 6117 + 9106 + 2168 - 4036 - 2644 + 8999

Output: 825


Input: Consider Input: 7427 + 8795 - 4104 + 7720 - 6667

Output: 1683


Input: Consider Input: 9316 - 4357 + 5577 + 8057 - 3044 + 5564 - 4487


Output: 2006