ArrayList随机shuffled，随机位置插入标签分组，Kotlin import java.util.Collectionsfun main(args: Array<String>) {val len = 20val segment = 3val SOURCE = arrayListOf<String>()for (i in 0..<len) {SOURCE.add("$i")}pr

Inclusion of a Shuffled String into Another String sliding window Instructions The function is given two strings s1 and s2. Determine if one of the permutations of characters of s1 is a substring