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: 2862 - 964 + 1644

Output: 2182


Input: Consider Input: 2980 - 6793 - 1879 + 5728 - 4199

Output: 10123


Input: Consider Input: 4720 + 5746 - 6115 - 470 - 5087 - 8471 - 5974


Output: 25091