feat: remove-nth-node-from-end-of-list solution

Author: YeomChaeeun

remove-nth-node-from-end-of-list/YeomChaeeun.ts

@@ -0,0 +1,38 @@
+/**
+ * Definition for singly-linked list.
+ * class ListNode {
+ *     val: number
+ *     next: ListNode | null
+ *     constructor(val?: number, next?: ListNode | null) {
+ *         this.val = (val===undefined ? 0 : val)
+ *         this.next = (next===undefined ? null : next)
+ *     }
+ * }
+ */
+/**
+ * n번째 노드 제거하기
+ * 알고리즘 복잡도
+ * - 시간 복잡도: O(n)
+ * - 공간 복잡도: O(n)
+ * @param head
+ * @param n
+ */
+function removeNthFromEnd(head: ListNode | null, n: number): ListNode | null {
+  let stack: ListNode[] = [];
+  let node = head;
+
+  while (node) {
+    stack.push(node);
+    node = node.next;
+  }
+
+  // 첫 번째 노드를 제거하는 경우 추가
+  if (stack.length - n - 1 < 0) {
+    return head?.next || null;
+  }
+
+  const prevNode = stack[stack.length - n - 1];
+  prevNode.next = prevNode.next?.next || null;
+
+  return head;
+}