Create 3217. Delete Nodes From Linked List Present in Array (#577)

Author: Chayandas07

3217. Delete Nodes From Linked List Present in Array

@@ -0,0 +1,40 @@
+/**
+ * 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) {}
+ * };
+ */
+class Solution {
+public:
+    ListNode* modifiedList(vector<int>& nums, ListNode* head) {
+        
+        unordered_set<int> s(nums.begin(), nums.end());
+
+        ListNode* headd = NULL;
+        ListNode* tail = NULL;
+        ListNode* curr = head;
+
+        while(curr)
+        {
+            if(!s.count(curr->val))
+            {
+                ListNode* Node = new ListNode(curr->val);
+
+                if(headd == NULL)
+                    headd = tail = Node;
+                else
+                {
+                    tail->next = Node;
+                    tail = Node;
+                }    
+            }
+            curr = curr->next;
+        }
+        tail->next = NULL;
+        return headd;
+    }
+};