joannae - 博客园

15. 3Sum (JAVA)

摘要： Given an array nums of n integers, are there elements a, b, cin nums such that a + b + c = 0? Find all unique triplets in the array which gives the su 阅读全文

posted @ 2019-04-25 19:04 joannae 阅读(143) 评论(0) 推荐(0) 编辑

13. Roman to Integer （JAVA)

摘要： Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. For example, two is written as II in Roman numeral, just two one's 阅读全文

posted @ 2019-04-25 16:20 joannae 阅读(145) 评论(0) 推荐(0) 编辑

12. Integer to Roman (JAVA)

摘要： Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. For example, two is written as II in Roman numeral, just two one's 阅读全文

posted @ 2019-04-25 15:47 joannae 阅读(226) 评论(0) 推荐(0) 编辑

11. Container With Most Water (JAVA)

摘要： Given n non-negative integers a1, a2, ..., an , where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endp 阅读全文

posted @ 2019-04-25 15:20 joannae 阅读(145) 评论(0) 推荐(0) 编辑

10. Regular Expression Matching (JAVA)

摘要： Given an input string (s) and a pattern (p), implement regular expression matching with support for '.' and '*'. '.' Matches any single character.'*' 阅读全文

posted @ 2019-04-24 14:12 joannae 阅读(142) 评论(0) 推荐(0) 编辑

9. Palindrome Number (JAVA)

摘要： Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Input: 121Output: true 阅读全文

posted @ 2019-04-23 17:54 joannae 阅读(149) 评论(0) 推荐(0) 编辑

sed (未完，待续）

摘要： sed [options] 'command' file(s) options: command: 阅读全文

posted @ 2018-08-18 18:38 joannae 阅读(153) 评论(0) 推荐(0) 编辑

grep及正则表达式

摘要： grep [OPTIONS] PATTERN [FILE...] OPTIONS: -i：忽略字符的大小写 -o：仅显示匹配到的字符串 -v：显示不能被模式匹配到的行 -E：支持使用扩展的正则表达式，grep -E等同于egrep，正则表达式可以不使用转义符\ -q：静默模式，即不输出任何信息 -A 阅读全文

posted @ 2018-08-18 12:09 joannae 阅读(174) 评论(0) 推荐(0) 编辑

167. Two Sum II - Input array is sorted (Array)

摘要： Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function 阅读全文

posted @ 2018-05-21 11:52 joannae 阅读(98) 评论(0) 推荐(0) 编辑

169. Majority Element (Array)

摘要： 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 the 阅读全文

posted @ 2017-04-08 20:18 joannae 阅读(111) 评论(0) 推荐(0) 编辑