Recursive using Java..


  • 0
    T
    /**
     * Definition for singly-linked list.
     * public class ListNode {
     *     int val;
     *     ListNode next;
     *     ListNode(int x) { val = x; }
     * }
     */
    public class Solution {
        public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
            if(l1 == null) return l2;
            if(l2 == null) return l1;
            
            if(l1.val < l2.val){
                l1.next = mergeTwoLists(l1.next, l2);
                return l1;
            }else{
                l2.next = mergeTwoLists(l1, l2.next);
                return l2;
            }
        }
    }

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