Round 1
Questions:
You are given a string s and a number k. String s is beautiful if s[i] = s[i + k].
Example:
k = 2,s1 = "252525",s2 = "234234", s1 is beautiful, s2 is not beautiful.
To make a string beautiful, you can change the digits. Eg. given k = 2 and s = "1234", turning it into "1212" would make it beautiful, but 1212 < 1234. Hence, you modify it into "1313".
Return beautiful string.
Candidate's Approach
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Interviewer's Feedback
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