AlgoStudyGroup · jinshendan · May 16, 2020 · May 16, 2020
diff --git a/May-LeetCoding-Challenge/16-Odd-Even-Linked-List/Odd-Even-Linked-List.kt b/May-LeetCoding-Challenge/16-Odd-Even-Linked-List/Odd-Even-Linked-List.kt
@@ -0,0 +1,80 @@
+class OddEvenLinkedListKotlin328 {
+    fun oddEvenList(head: ListNode?): ListNode? {
+        if (head?.next?.next == null) {
+            return head
+        }
+        val evenHead = head.next
+
+        var odd = head
+        var even = head.next
+        var current = even
+        var count = 0
+        while (current?.next != null) {
+            current = current.next
+            if (count % 2 == 0) {
+                odd?.next = current
+                odd = current
+            } else {
+                even?.next = current
+                even = current
+            }
+            count++
+        }
+        even?.next = null
+        odd?.next = evenHead
+        return head
+    }
+    /*
+    fun oddEvenList(head: ListNode?): ListNode? {
+        if (head?.next?.next == null) {
+            return head
+        }
+        val evenHead = head.next
+
+        var odd = head
+        var even = head.next
+        var current = even
+        var isOdd = true
+        while (current?.next != null) {
+            current = current.next
+            if (isOdd) {
+                isOdd = !isOdd
+                odd?.next = current
+                odd = current
+            } else {
+                isOdd = !isOdd
+                even?.next = current
+                even = current
+            }
+        }
+        even?.next = null
+        odd?.next = evenHead
+        return head
+    }
+     */
+
+    class ListNode(var `val`: Int) {
+        var next: ListNode? = null
+    }
+}
+
+fun main() {
+    val node1 = OddEvenLinkedListKotlin328.ListNode(1)
+    val node2 = OddEvenLinkedListKotlin328.ListNode(2)
+    val node3 = OddEvenLinkedListKotlin328.ListNode(3)
+    val node4 = OddEvenLinkedListKotlin328.ListNode(4)
+    val node5 = OddEvenLinkedListKotlin328.ListNode(5)
+    node1.next = node2
+    node2.next = node3
+    node3.next = node4
+    node4.next = node5
+
+    val solution = OddEvenLinkedListKotlin328()
+    var result = solution.oddEvenList(node1)
+
+    while (result?.next != null) {
+        println(result.`val`)
+        result = result.next
+    }
+    println(result?.`val`)
+}