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Given a stream of integers and a window size, calculate the moving average of all integers in the sliding window. For example, https://discuss.leetcod 阅读全文
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Given a nested list of integers, return the sum of all integers in the list weighted by their depth. Each element is either an integer, or a list -- w 阅读全文
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Implement a simple twitter. Support the following method: 阅读全文
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Write a program to solve a Sudoku puzzle by filling the empty cells. Empty cells are indicated by the character '.'. You may assume that there will be 阅读全文
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java中的数据类型，可分为两类： 1.基本数据类型，也称原始数据类型。byte,short,char,int,long,float,double,boolean 他们之间的比较，应用双等号（==）,比较的是他们的值。 2.复合数据类型(类) 当他们用（==）进行比较的时候，比较的是他们在内存中的存 阅读全文
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The thief has found himself a new place for his thievery again. There is only one entrance to this area, called the "root." Besides the root, each hou 阅读全文
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Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example: The key is n--. The minimum in 26-bit number 阅读全文
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Compare two version numbers version1 and version2.If version1 > version2 return 1, if version1 < version2 return -1, otherwise return 0. You may assum 阅读全文
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Divide two integers without using multiplication, division and mod operator. If it is overflow, return MAX_INT. Subscribe to see which companies asked 阅读全文
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Implement regular expression matching with support for '.' and '*'. 题目： 正则表达式的匹配，'.'能匹配任何一个字符，'*'之前必须有一个字符，两个结合起来表示之前那个字符出现0到无穷次。 解法： 一定要注意'*'必须结合前面的字 阅读全文