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: 9549 - 507 + 659 + 3404 - 9243

Output: 15236


Input: Consider Input: 7020 - 2005 - 6587 - 8828 - 2838 - 6957


Output: 34235