Solution to #16

bharatr21 · May 17, 2020 · dcd73ae · dcd73ae
1 parent d8b1deb
commit dcd73ae
Showing 1 changed file with 26 additions and 0 deletions.
diff --git a/Solutions/S16.cpp b/Solutions/S16.cpp
@@ -0,0 +1,26 @@
+/**
+ * Definition for singly-linked list.
+ * struct ListNode {
+ *     int val;
+ *     ListNode *next;
+ *     ListNode() : val(0), next(nullptr) {}
+ *     ListNode(int x) : val(x), next(nullptr) {}
+ *     ListNode(int x, ListNode *next) : val(x), next(next) {}
+ * };
+ */
+
+ListNode* oddEvenList(ListNode* head) {
+    if(!head) return NULL;
+    else {
+        ListNode *odd = head, *even = head->next, *evenHead = even;
+        while(even && even->next)
+        {
+            odd->next = even->next;
+            odd = odd->next;
+            even->next = odd->next;
+            even = even->next;
+        }
+        odd->next = evenHead;
+        return head;
+    }
+}