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: 6439 - 6685 + 6156 - 3314 + 6845 - 6872

Output: 10309


Input: Consider Input: 7746 - 2667 + 1801 - 5756 - 6076 - 6701 + 3002

Output: 24143


Input: Consider Input: 6050 - 5266 - 3005


Output: 14321