import java.util.HashMap; public class map1 { public static void main(String[] args) { String[] array = {"a","b","a","b","c","a","b","c","b"}; HashMap<String, Int
Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Note that k is guaranteed to be a positive integer. You may assume th