#459. Read until 0: average (2 decimal places)
Numbers come one on each line. The input ends when the number 0 comes (the 0 is not counted). Find the **average (2 decimal places)** of the numbers.
### Input
Several integers, the last one is 0. There is at least one number before the 0.
### Output
The answer.
Examples
Input
-17 49 52 60 85 -48 0
Output
30.17
Input
60 0
Output
60.00
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.