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: 8798 - 6887 - 9478 - 7713 + 8512 + 7926 - 8604 + 2947 + 7573

Output: 14522


Input: Consider Input: 7427 + 8795 - 4104 + 7720 - 6667

Output: 1683


Input: Consider Input: 1811 + 1950 + 4025 - 7077 - 9566 + 8618 + 6520 - 2729


Output: 70