聆听V风声 - 博客园

[leetcode 23]Merge k Sorted Lists

摘要： 1 题目Mergeksorted linked lists and return it as one sorted list. Analyze and describe its complexity.2 思路当时看到这个题目就想到的是归并排序。好吧，但是，具体代码写不出来。题目给的是数组：publi... 阅读全文

posted @ 2015-09-14 22:13 聆听V风声阅读(175) 评论(0) 推荐(0)

[leetcode 22]generate parentheses

摘要： 1 题目：Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is:"(... 阅读全文

posted @ 2015-09-06 21:37 聆听V风声阅读(209) 评论(0) 推荐(0)

[leetcode 21] Merge Two Sorted Lists

摘要： 1 题目：Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.2 思路... 阅读全文

posted @ 2015-09-04 22:20 聆听V风声阅读(141) 评论(0) 推荐(0)

[leetcode 20] Valid Parentheses

摘要： 1 题目Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the corr... 阅读全文

posted @ 2015-09-03 11:10 聆听V风声阅读(122) 评论(0) 推荐(0)

[leetcode 18]4Sum

摘要： 1 题目：Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the su... 阅读全文

posted @ 2015-09-02 22:04 聆听V风声阅读(159) 评论(0) 推荐(0)

[leetcode 19] Remove Nth Node From End of List

摘要： 1 题目Given a linked list, remove thenthnode from the end of list and return its head.For example, Given linked list: 1->2->3->4->5, and n = 2. Afte... 阅读全文

posted @ 2015-09-02 19:29 聆听V风声阅读(117) 评论(0) 推荐(0)

[leetcode 17]Letter Combinations of a Phone Number

摘要： 1 题目：Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the tel... 阅读全文

posted @ 2015-09-02 16:00 聆听V风声阅读(153) 评论(0) 推荐(0)

[leetcode 226] Invert Tree

摘要： 1 题目：Invert a binary tree. 4 / \ 2 7 / \ / \1 3 6 9to 4 / \ 7 2 / \ / \9 6 3 12 思路：这是因为谷歌面试xx而著名的题，拿来做做。想了一会，想出来... 阅读全文

posted @ 2015-09-01 19:13 聆听V风声阅读(141) 评论(0) 推荐(0)

[leetcode 16] 3Sum Closest

摘要： 1 题目Given an arraySofnintegers, find three integers inSsuch that the sum is closest to a given number, target. Return the sum of the three integers. Y... 阅读全文

posted @ 2015-09-01 09:40 聆听V风声阅读(136) 评论(0) 推荐(0)

[leetcode 15] 3Sum

摘要： 1 题目：Given an arraySofnintegers, are there elementsa,b,cinSsuch thata+b+c= 0? Find all unique triplets in the array which gives the sum of zero.Note:E... 阅读全文

posted @ 2015-06-15 10:46 聆听V风声阅读(148) 评论(0) 推荐(0)

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