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: 2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048

Output: 18149


Input: Consider Input: 4226 - 3951 + 2613

Output: 5564


Input: Consider Input: 9751 - 8797 - 686 + 76


Output: 19158