refactor 394

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_394.java

@@ -2,6 +2,22 @@
 
 import java.util.Stack;
 
+/**394. Decode String
+ *
+ * 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 that the input string is always valid;
+ * No extra white spaces, square brackets are well-formed, etc.
+ * Furthermore, you may assume that the original data does not contain any digits and
+ * that digits are only for those repeat numbers, k. For example, there won't be input like 3a or 2[4].
+ *
+ * Examples:
+ * s = "3[a]2[bc]", return "aaabcbc".
+ * s = "3[a2[c]]", return "accaccacc".
+ * s = "2[abc]3[cd]ef", return "abcabccdcdcdef".
+ * */
+
 public class _394 {
 
     public static class Solution1 {