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Leetcode 21. merge two ordered linked lists

2022-07-22 20:12:00 【henujolly】

class Solution {
    
    public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
    
        ListNode res = new ListNode();
        ListNode current = res;
        while(l1 != null && l2 != null) {
    
            if(l1.val < l2.val) {
    
                current.next = l1;
                l1 = l1.next;
            }else {
    
                current.next = l2;
                l2 = l2.next;
            }
            current = current.next;
        }
        if(l1 != null) {
    
            current.next = l1;
        }else {
    
            current.next = l2;
        }
        return res.next;
    }
}