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LeetCode234_PalindromeLinkedList (判断是否为回文链表) Java题解
题目: Given a singly linked list, determine if it is a palindrome. Follow up: Could you do it in O(n) time and O(1) space? 题解: 判断一个链表是不是回文的,这里要求O(n)时间复杂度和O(1)的空间时间复杂度,总共想了三种办法,三种办法都用到了两个指针,符合...
分类:编程语言   时间:2015-07-29 12:13:09    阅读次数:136
Codeforces Gym 100570 E. Palindrome Query Manacher
E. Palindrome QueryTime Limit: 20 SecMemory Limit: 256 MB题目连接http://codeforces.com/gym/100570/problem/EDescriptionDe Prezer loves palindrome strings. ...
分类:其他好文   时间:2015-07-29 00:28:50    阅读次数:356
[LeetCode][Java] Valid Palindrome
题目: Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" ...
分类:编程语言   时间:2015-07-28 16:05:25    阅读次数:138
【LeetCode】9 - Palindrome Number
Determine whether an integer is a palindrome. Do this without extra space.Some hints:Could negative integers be palindromes? (ie, -1)If you are thinki...
分类:其他好文   时间:2015-07-28 00:31:41    阅读次数:124
LeetCode234:Palindrome Linked List
Given a singly linked list, determine if it is a palindrome. Follow up: Could you do it in O(n) time and O(1) space? 给定一个单链表,判断它的元素是否是回文。要求在O(n)的时间复杂度和O(1)的空间复杂度内求解。如果没有时间复杂度的限制,可以直接将链表反转再比较就...
分类:其他好文   时间:2015-07-27 16:20:55    阅读次数:88
POJ 1159 Palindrome(区间DP/最长公共子序列+滚动数组)
给一个字符串,计算最少加多少个字符能够使字符串变成回文串(即从前往后读与从后往前读一样)。 有2种思路,一种是直接区间DP,dp[j][i]表示[i,j]这个子串要变成回文串需要添加多少个字符,状态转移方程 如下: if(s[i]==s[j]) dp[j][i]=dp[j+1][i-1]; else dp[j][i]=1+min(min[j+1][i],min[j][i-1]) 第二种思路也比较容易想,要将一个字符串变为回文串,那么我们...
分类:编程语言   时间:2015-07-27 00:19:30    阅读次数:239
【LeetCode】234 - Palindrome Linked List
Given a singly linked list, determine if it is a palindrome.Follow up:Could you do it in O(n) time and O(1) space?Hide Tags:Linked ListTwo Pointers 1 ...
分类:其他好文   时间:2015-07-26 22:26:57    阅读次数:131
[leedcode 132] Palindrome Partitioning II
Given a strings, partitionssuch that every substring of the partition is a palindrome.Return the minimum cuts needed for a palindrome partitioning ofs...
分类:其他好文   时间:2015-07-26 15:25:58    阅读次数:128
[leedcode 131] Palindrome Partitioning
Given a strings, partitionssuch that every substring of the partition is a palindrome.Return all possible palindrome partitioning ofs.For example, giv...
分类:其他好文   时间:2015-07-26 15:24:54    阅读次数:98
【leetcode】Valid Palindrome
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal: Pana...
分类:其他好文   时间:2015-07-26 12:38:25    阅读次数:131
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