~每天进步一点点~

2015年7月8日

[leedcode 26] Remove Duplicates from Sorted Array

摘要： Given a sorted array, remove the duplicates in place such that each element appear onlyonceand return the new length.Do not allocate extra space for a... 阅读全文

posted @ 2015-07-08 21:06 ~每天进步一点点~ 阅读(89) 评论(0) 推荐(0) 编辑

[leedcode 25] Reverse Nodes in k-Group

摘要： Given a linked list, reverse the nodes of a linked listkat a time and return its modified list.If the number of nodes is not a multiple ofkthen left-o... 阅读全文

posted @ 2015-07-08 18:11 ~每天进步一点点~ 阅读(197) 评论(0) 推荐(0) 编辑

[leedcode 24] Swap Nodes in Pairs

摘要： Given a linked list, swap every two adjacent nodes and return its head.For example,Given1->2->3->4, you should return the list as2->1->4->3.Your algor... 阅读全文

posted @ 2015-07-08 13:55 ~每天进步一点点~ 阅读(124) 评论(0) 推荐(0) 编辑

2015年7月7日

[leedcode 22] Generate Parentheses

摘要： public class Solution { //卡特兰数，一共有C2n^n-C2n^n-1种组合数 //本题的递归非常经典，需要多看牢记 List res; StringBuilder seq; public List generateParenthesis(int... 阅读全文

posted @ 2015-07-07 22:52 ~每天进步一点点~ 阅读(114) 评论(0) 推荐(0) 编辑

[leedcode 23] Merge k Sorted Lists

摘要： /** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * } */public... 阅读全文

posted @ 2015-07-07 22:19 ~每天进步一点点~ 阅读(186) 评论(0) 推荐(0) 编辑

[leedcode 21] Merge Two Sorted Lists

摘要： /** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * } */public... 阅读全文

posted @ 2015-07-07 18:25 ~每天进步一点点~ 阅读(137) 评论(0) 推荐(0) 编辑

[leedcode 20] Valid Parentheses

摘要： 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 @ 2015-07-07 17:51 ~每天进步一点点~ 阅读(104) 评论(0) 推荐(0) 编辑

[leedcode 19]Remove Nth Node From End of List

摘要： 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. After re... 阅读全文

posted @ 2015-07-07 15:39 ~每天进步一点点~ 阅读(81) 评论(0) 推荐(0) 编辑

[leedcode 18] 4Sum

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

posted @ 2015-07-07 15:14 ~每天进步一点点~ 阅读(124) 评论(0) 推荐(0) 编辑

[leedcode 17] Letter Combinations of a Phone Number

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

posted @ 2015-07-07 13:36 ~每天进步一点点~ 阅读(129) 评论(0) 推荐(0) 编辑

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