Leetcode_021_Merge_Two_Sorted_Lists.java - package...

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package coding.leetcode; /** * Created by Administrator on 2016-12-08. */ public class Leetcode_021_Merge_Two_Sorted_Lists { public class ListNode { int val; ListNode next; ListNode(int x) { val = x; } } public ListNode mergeTwoLists(ListNode l1, ListNode l2) { ListNode sentinel = new ListNode(0); // 이 트릭으로 인해서 while loop 내에 if(head == null) 같은게 필요없게 된다 . 마지막에 head.next 리턴하면 되니까 . ListNode prev = sentinel; while(l1 != null || l2 != null){ if(l1 == null){ prev.next = l2; break; } else if(l2 == null){ prev.next = l1; break; } else if(l1.val < l2.val){ prev.next = l1;
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  • Fall '19
  • Return statement, Val, Void type, public class ListNode

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