Closest string

The "closest string" problem often refers to a computational problem in the realm of string processing or bioinformatics. It typically involves determining a string (or multiple strings) that is closest to a given string based on a defined metric, usually in terms of edit distance. The most commonly used metric for this purpose is the Levenshtein distance, which measures how many single-character edits (insertions, deletions, or substitutions) are required to change one string into another.