[LeetCode] Minimum Genetic Mutation

433. Minimum Genetic Mutation A gene string can be represented by an 8-character long string, with choices from ‘A’, ‘C’, ‘G’, and ‘T’. Suppose we need to investigate a mutation from a gene string start to a gene string end where one mutation is defined as one single character changed in the gene string. For example, “AACCGGTT” –> “AACCGGTA” is one mutation. There is also a gene bank bank that records all the valid gene mutations. A gene must be in bank to make it a valid gene string. Given t...

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