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The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221, ...1is read off as"one 1"or11.11is read off as"tw... 阅读全文
posted @ 2015-04-10 21:57
amazingzoe
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Given a positive integer, return its corresponding column title as appear in an Excel sheet.For example: 1 -> A 2 -> B 3 -> C ... 26 ->... 阅读全文
posted @ 2015-04-10 21:00
amazingzoe
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Given an array of sizen, find the majority element. The majority element is the element that appears more than⌊ n/2 ⌋times.You may assume that the arr... 阅读全文
posted @ 2015-04-10 20:06
amazingzoe
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Given an integern, return the number of trailing zeroes inn!.Note:Your solution should be in logarithmic time complexity.Solution1: 1 class Solution {... 阅读全文
posted @ 2015-04-10 18:56
amazingzoe
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Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the correct ... 阅读全文
posted @ 2015-04-10 16:22
amazingzoe
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