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leetcode之Palindrome Partitioning
方法一:DFS递归,判断每一个是否为回文数1,首先要有一个判断字符串是否是回文的函数。容易实现,字符串从两边同时往中间走,看字符是否相同;2,深度优先搜索思想对字符串进行遍历。得到结果。例如,s = "abacd"; 需要对“a”“ad”“aba”“abac”“abacd”进行深度优先搜索。深度搜索...
分类:其他好文   时间:2014-05-06 00:52:34    阅读次数:388
[leetcode] Best Time to Buy and Sell Stock II
Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find the maximum profit. You may complete a...
分类:其他好文   时间:2014-05-06 00:51:29    阅读次数:353
Leetcode | Merge k Sorted Lists
Mergeksorted linked lists and return it as one sorted list. Analyze and describe its complexity.想法很简单,就是两两合并。在Merge Two Sorted Lists这道题已经实现了两两合并的代码了,就...
分类:其他好文   时间:2014-05-06 00:22:01    阅读次数:337
LeetCode---Merge Intervals
题目链接区间合并,贪心,需要注意边界情况,LeetCode的数据还是比较好的,这样才能写出健壮的程序。附上代码: 1 /** 2 * Definition for an interval. 3 * struct Interval { 4 * int start; 5 * in...
分类:其他好文   时间:2014-05-06 00:16:44    阅读次数:400
LeetCode---Triangle
题目链接很简单的递推,但是写代码的过程中,犯了一个严重的错误,就是我用unsigned int型变量>= 0 作为循环条件(而且是降序)的时候,出现了问题。附上代码: 1 class Solution { 2 public: 3 int minimumTotal(vector > &tria...
分类:其他好文   时间:2014-05-06 00:10:57    阅读次数:335
Leetcode | Sum Root to Leaf Numbers
Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number.An example is the root-to-leaf path 1->2->3 which...
分类:其他好文   时间:2014-05-05 23:55:36    阅读次数:407
Leetcode | Longest Consecutive Sequence
Given an unsorted array of integers, find the length of the longest consecutive elements sequence.For example,Given [100, 4, 200, 1, 3, 2],The longest...
分类:其他好文   时间:2014-05-05 23:01:41    阅读次数:374
【LeetCode OJ】Sum Root to Leaf Numbers
# Definition for a binary tree node# class TreeNode:# def __init__(self, x):# self.val = x# self.left = None# self.right ...
分类:其他好文   时间:2014-05-05 22:56:23    阅读次数:419
【LeetCode OJ】Longest Consecutive Sequence
Problem Link:http://oj.leetcode.com/problems/longest-consecutive-sequence/This problem is a classical problem where we can reduce the running time by ...
分类:其他好文   时间:2014-05-05 22:55:22    阅读次数:552
Reverse Linked List II
Link:http://oj.leetcode.com/problems/reverse-linked-list-ii/Reverse a linked list from positionmton. Do it in-place and in one-pass.For example:Given1...
分类:其他好文   时间:2014-05-05 22:46:11    阅读次数:411
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