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Given a non-empty array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runti 阅读全文
摘要：
The gray code is a binary numeral system where two successive values differ in only one bit. Given a non-negative integer n representing the total num 阅读全文
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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
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Design a data structure that supports the following two operations: search(word) can search a literal word or a regular expression string containing o 阅读全文
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Given an integer array nums, find the contiguous subarray within an array (containing at least one number) which has the largest product. Example 1: E 阅读全文