Order by sum of digits

Write a function @sum_of_digits_sorted(f)@ that provided a list of non negative integers $f$ returns a list $g$ with the very same numbers in $f$ . Numbers in $g$ must appear in increasing sum of digits. For instance, if $56$ and $2131$ are numbers in $f$ , number $2131$ will appear before $56$ in $g$ because the sum of digits of $2131$ (sum is 7) is less the sum of digits of $56$ (sum is 11). Numbers of the same sum of digits must appear in the usual increasing order.

Sample session

Problem information

Author: ProAl

Generation: 2026-01-25T15:23:49.269Z