Sixty-Eight Commit: Add Remove Nodes From Linked List problem to Monotonic Stack section

Author: AAdewunmi

src/Monotonic_Stack/Problem_3_Nodes_From_Linked_List.java

@@ -0,0 +1,32 @@
+package Monotonic_Stack;
+
+// Problem Statement: Remove Nodes From Linked List (easy)
+// LeetCode Question: 2487. Remove Nodes From Linked List
+
+import java.util.Stack;
+
+class ListNode {
+    int val;
+    ListNode next;
+    ListNode(int val){
+        this.val = val;
+    }
+}
+public class Problem_3_Nodes_From_Linked_List {
+
+    public ListNode removeNodes(ListNode head){
+        Stack<ListNode> stack = new Stack<>();
+        ListNode cur = head;
+        while (cur != null) {
+            while (!stack.isEmpty() && stack.peek().val < cur.val){
+                stack.pop();
+            }
+            if (!stack.isEmpty()) {
+                stack.peek().next = cur;
+            }
+            stack.push(cur);
+            cur = cur.next;
+        }
+        return stack.isEmpty() ? null : stack.get(0);
+    }
+}