摘要：
Implement a trie with insert, search, and startsWith methods. Example: Trie trie = new Trie(); trie.insert("apple"); trie.search("apple"); // returns 阅读全文
posted @ 2019-04-26 15:09
小白兔云
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There are a total of n courses you have to take, labeled from 0 to n-1. Some courses may have prerequisites, for example to take course 0 you have to 阅读全文
posted @ 2019-04-26 11:49
小白兔云
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摘要：
Given an array of n positive integers and a positive integer s, find the minimal length of a contiguous subarray of which the sum ≥ s. If there isn't 阅读全文
posted @ 2019-04-26 11:18
小白兔云
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