Add task definition for ReverseLinkedList task

Author: andrei-punko

src/main/java/by/andd3dfx/collections/ReverseLinkedList.java

@@ -1,19 +1,39 @@
 package by.andd3dfx.collections;
 
-import lombok.AllArgsConstructor;
-import lombok.Data;
-
 import java.util.ArrayDeque;
 import java.util.Deque;
+import lombok.AllArgsConstructor;
+import lombok.Data;
 
 /**
+ * <pre>
+ * <a href="https://leetcode.com/problems/reverse-linked-list/">Task description</a>
+ *
+ * Given the head of a singly linked list, reverse the list, and return the reversed list.
+ *
+ * Example 1:
+ * <img src="https://assets.leetcode.com/uploads/2021/02/19/rev1ex1.jpg"/>
+ * Input: head = [1,2,3,4,5]
+ * Output: [5,4,3,2,1]
+ *
+ * Example 2:
+ * <img src="https://assets.leetcode.com/uploads/2021/02/19/rev1ex2.jpg"/>
+ * Input: head = [1,2]
+ * Output: [2,1]
+ *
+ * Example 3:
+ * Input: head = []
+ * Output: []
+ * </pre>
+ *
  * @see <a href="https://youtu.be/iEKdRgKNurg">Video solution</a>
  */
 public class ReverseLinkedList {
 
     @Data
     @AllArgsConstructor
     public static class Node<T> {
+
         private T value;
         private Node next;