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Palindrome Partitioning II
题目 Given a string s, partition s such that every substring of the partition is a palindrome. Return the minimum cuts needed for a palindrome partitioning of s. For example, given s = "a...
分类:其他好文   时间:2014-06-20 13:44:18    阅读次数:234
[LeetCode] Palindrome Number [13]
题目: Determine whether an integer is a palindrome. Do this without extra space. 解题思路: 判断一个int型整数是不是回文数字,这个题也不难,依次取得数字最高位和最低位进行比较,就可以判断是不是回文数字。需要注意的是负数不是回文数字。 代码实现:...
分类:其他好文   时间:2014-06-08 15:35:48    阅读次数:375
leetcode——Add Two Numbers 两个链表表示的正整数对其求和(AC)
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a link...
分类:其他好文   时间:2014-06-08 15:30:28    阅读次数:227
[LeetCode] Palindrome Partitioning II [12]
题目:For example, given s = "aab", Return 1 since the palindrome partitioning ["aa","b"] could be produced using 1 cut 解题思路:给一个字符串,如果字符串可以划分成若干子回文字符串,返回最小的划分数量。 这个题如果还用之前求所有划分组合的循环加递归方法的话,就会得到超时的错误。这是就要考虑别的方法,动态规划倒是一个不错的方法,但是动态规划最重要的是要找到动态方程。本题的动态方程: dp[i] =...
分类:其他好文   时间:2014-06-08 14:56:58    阅读次数:257
字典树 Trie (HDU 1671)
Problem Description Given a list of phone numbers, determine if it is consistent in the sense that no number is the prefix of another. Let’s say the phone catalogue listed these numbers: 1. Emergenc...
分类:其他好文   时间:2014-06-08 10:31:22    阅读次数:234
LeetCode:Minimum Path Sum
题目链接 Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its p...
分类:其他好文   时间:2014-06-07 21:59:08    阅读次数:344
leetcode--Minimum Path Sum
Given amxngrid filled with non-negative numbers, find a path from top left to bottom right whichminimizesthe sum of all numbers along its path.Note:Yo...
分类:其他好文   时间:2014-06-07 20:22:17    阅读次数:264
projecteuler---->problem=18----Maximum path sum I
By starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum total from top to bottom is 23. 3 7 4 2 4 6 8 5 9 3 That is, 3 + 7 + 4 + 9 = 23. Find th...
分类:其他好文   时间:2014-06-07 13:45:25    阅读次数:189
projecteuler---->problem=21----Amicable numbers
Let d(n) be defined as the sum of proper divisors of n (numbers less than n which divide evenly into n). If d(a) = b and d(b) = a, where a b, then a and b are an amicable pair and each of a and b...
分类:其他好文   时间:2014-06-07 13:40:53    阅读次数:226
[LeetCode] Longest Palindromic Substring [14]
最长回文字串,相信做过Palindrome Partitioning II 这个题的同学应该可以很快做出来。没错,这个题还可以使用动态规划方法得到一个时间复杂度为O(n^2)的解法,当然如果你想要更好的时间复杂度的算法也是有的。好的,我们先来看看时间复杂度为O(n^2)的算法。 代码实现--动态规划O(n^2) 相信如果你在网上看过了别人的算法,你会发现我的算法是最简洁的。哈哈,这个题需要注意的是如果你用惯了vector的话,你这里肯定会得到超时的提示... ...代码二--复杂度为O(n)的算法...
分类:其他好文   时间:2014-06-07 12:08:43    阅读次数:224
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