Runtime error forever!!


  • 0
    N

    I carefully debugged my code and it is perfectly running on my local machine. But the online judge keep prompting "runtime error, last executed input: {}".
    Finally I change my code to an extreme naive one:

    class ListNode {
         int val;
         ListNode next;
         ListNode(int x) {
             val = x;
             next = null;
         }
     }
    
    public class Solution {
        public ListNode sortList(ListNode head) {
            return new ListNode(0);
        }
    }
    

    Still, it prompts the same problem!!!
    Is there any chance that the online judge breaks down?


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