Statistics are often calculated with varying amounts of input data. Write a program that takes any number of non-negative integers as input, and outputs the average and max. A negative integer ends the input and is not included in the statistics. Ex: When the input is:

15 20 0 5 -1
the output is:

10 20
You can assume that at least one non-negative integer is input.

leaning back,   no eye contact,   fidgeting in the seat

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