feat: fixed bug in Zion's GameResult and Stack Results to lesson_12 hw

Author: zionbuch

lesson_12/structs_java/structs_app/src/main/java/com/codedifferently/lesson12/Lesson12.java

@@ -10,7 +10,7 @@ public String gameResult(ListNode head) {
     ListNode current = head;
     int even = 0;
     int odd = 0;
-    while (current.next != null) {
+    while (current != null) {
       ListNode nextNode = current.next;
       if (current.val < nextNode.val) {
         odd++;
@@ -26,7 +26,6 @@ public String gameResult(ListNode head) {
     if (even < odd) {
       return "Odd";
     }
-
     if (even == odd) {
       return "Tie";
     }

lesson_12/structs_java/structs_app/src/main/java/com/codedifferently/lesson12/Stack.java

@@ -28,3 +28,4 @@ public boolean isEmpty() {
     return top == null;
   }
 }
+// I used chatgpt to walk me through the implementation without giving me the answers.