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Solution.java
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Solution.java
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package g0301_0400.s0328_odd_even_linked_list;
// #Medium #Linked_List #Level_2_Day_4_Linked_List #Udemy_Linked_List
// #2022_07_09_Time_0_ms_(100.00%)_Space_44.8_MB_(44.32%)
import com_github_leetcode.ListNode;
/*
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode() {}
* ListNode(int val) { this.val = val; }
* ListNode(int val, ListNode next) { this.val = val; this.next = next; }
* }
*/
public class Solution {
public ListNode oddEvenList(ListNode head) {
if (head != null) {
ListNode odd = head;
ListNode even = head.next;
ListNode evenHead = even;
while (even != null && even.next != null) {
odd.next = odd.next.next;
even.next = even.next.next;
odd = odd.next;
even = even.next;
}
odd.next = evenHead;
}
return head;
}
}