Problem 42816. Sorting integers by their digits (Level 4)
An interesting series of sorting problems, ranging from integer to floating point numbers, and from real-valued to complex numbers.
This sort series problem are interesting and also challeging, and for solving this series, regular expression, string, data index and function, etc. all kinds of skill are required. learned a lot, thx!
@Bainhome Absolutely agree!...A very interesting series for both the aficionados and virtuoso. Sure we all had fun. :) Thanks HH.
recently looked back this problem, and studied every code that worth to studied. All code (except mine) are excellent and mind blower, but I enjoyed this one and Liu Peng's the most. Liu's code are more "numericalized", and better fit the idea about "index" title; this one is bit of instructive: definitely enrich my knowledge about "replace" action in regular expression. I'll take a very serious note about this two ideas. THX buddy.
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Get the elements of diagonal and antidiagonal for any m-by-n matrix
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