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: 6874 + 7308 - 3041

Output: 2607


Input: Consider Input: 8838 + 1241 - 4918 - 8353 - 4691 - 5880

Output: 31439


Input: Consider Input: 4564 + 3084 + 3952 - 9095 + 6899 - 8064


Output: 7788