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: 6570 + 2902 + 9219 - 6971 + 6886 + 765

Output: -6231


Input: Consider Input: 7149 - 7250 - 2026 - 4929 - 5525 + 1967 + 895 + 4245 - 720

Output: 20492


Input: Consider Input: 3004 - 5408 + 5759 + 2810 - 250


Output: 93