Tip: This kind of problem that seems incredibly hard usually have a formula (someone already researched this). Find the formula, and solve the problem.
Encode Roman Numerals
USC Fall 2012 ACM : Code Word Minimum Flipped Bits
Genome Sequence 003R: Sequence DNA of random positioned and flipped segments
GJam 2014 China Rd A: Read Phone Number
Mastermind II: Solve in 8 or less
Create a Video
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