LCS

LCS, or Longest Common Subsequence, is a method used to find the longest sequence of elements (like characters or numbers) that appear in both of two sequences in the same order, but not necessarily consecutively. For example, in words, the sequence "ACE" is the LCS of "ABCDE" and "AFCDE" because it appears in both in the same order. This concept helps in tasks like comparing files, DNA analysis, and version control, by identifying similarities despite differences or insertions. It's a way to measure how closely two sequences are related based on shared ordering of elements.