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: 9447 - 88 - 9606 - 2754

Output: 21895


Input: Consider Input: 1815 - 3167 - 773

Output: 5755


Input: Consider Input: 6439 + 7693 - 718 + 9859 - 890 + 30 - 1809


Output: -7726