37 lines
1.1 KiB
Java
37 lines
1.1 KiB
Java
package com.zerroi.leetcode.Three23;
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public class MergeTwoLists {
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public static void main(String[] args) {
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ListNode l1 = new ListNode(1, new ListNode(2, new ListNode(4)));
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ListNode l2 = new ListNode(1, new ListNode(3, new ListNode(4)));
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SolutionSecond solutionSecond = new SolutionSecond();
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solutionSecond.mergeTwoLists(l1, l2);
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}
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}
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class SolutionSecond {
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public ListNode mergeTwoLists(ListNode list1, ListNode list2) {
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if (list1 == null || list2 == null) {
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return list1 == null ? list2 : list1;
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}
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ListNode pre = new ListNode(-1);
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ListNode cur = pre;
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while (list1 != null && list2 != null) {
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if (list1.val <= list2.val) {
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cur.next = list1;
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list1 = list1.next;
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} else {
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cur.next = list2;
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list2 = list2.next;
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}
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cur = cur.next;
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if (list1 == null) {
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cur.next = list2;
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}
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if (list2 == null) {
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cur.next = list1;
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}
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}
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return pre.next;
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}
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}
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