It's a bit disappointing. There are many problems that are explained so naturally that it's as if I'm breathing. I'm frustrated because there's no explanation of why the solution should be <b></b> like that. The explanation I wanted was something like, "The problem of finding the distance between strings is a problem for searching, but to search, you have to do a full traversal, so you have to make it into an array, and so you have to run a loop." But is that too greedy? ㅠㅠㅠ