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refactor 876
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  • src/main/java/com/fishercoder/solutions

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src/main/java/com/fishercoder/solutions/_876.java

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import com.fishercoder.common.classes.ListNode;
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/**
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* 876. Middle of the Linked List
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*
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* Given a non-empty, singly linked list with head node head, return a middle node of linked list.
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*
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* If there are two middle nodes, return the second middle node.
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*
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* Example 1:
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*
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* Input: [1,2,3,4,5]
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* Output: Node 3 from this list (Serialization: [3,4,5])
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* The returned node has value 3. (The judge's serialization of this node is [3,4,5]).
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* Note that we returned a ListNode object ans, such that:
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* ans.val = 3, ans.next.val = 4, ans.next.next.val = 5, and ans.next.next.next = NULL.
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*
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* Example 2:
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*
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* Input: [1,2,3,4,5,6]
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* Output: Node 4 from this list (Serialization: [4,5,6])
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* Since the list has two middle nodes with values 3 and 4, we return the second one.
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*
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* Note:
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*
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* The number of nodes in the given list will be between 1 and 100.
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*/
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public class _876 {
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public static class Solution1 {
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public ListNode middleNode(ListNode head) {
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ListNode fast = head;
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ListNode slow = head;
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while (fast != null && fast.next != null) {
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fast = fast.next.next;
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slow = slow.next;
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}
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return slow;
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public static class Solution1 {
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public ListNode middleNode(ListNode head) {
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ListNode fast = head;
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ListNode slow = head;
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while (fast != null && fast.next != null) {
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fast = fast.next.next;
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slow = slow.next;
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}
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return slow;
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}
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}
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}
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}

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