摘要：
题目： You are given a data structure of employee information, which includes the employee's unique id, his importance value and his direct subordinates' 阅读全文
摘要：
题目： In this problem, a tree is an undirected graph that is connected and has no cycles. The given input is a graph that started as a tree with N nodes 阅读全文
摘要：
题目： Implement a trie with insert, search, and startsWith methods. Example: Trie trie = new Trie(); trie.insert("apple"); trie.search("apple"); // retu 阅读全文