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题目： Related to question Excel Sheet Column Title Given a column title as appear in an Excel sheet, return its corresponding column number. For example 阅读全文
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题目： Design and implement a TwoSum class. It should support the following operations: add and find. add - Add the number to an internal data structure. 阅读全文
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题目： Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that 阅读全文
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题目： Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example: 链接： http://leetcode.com/problems/excel-s 阅读全文