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...
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其他好文 时间:
2014-05-06 00:52:34
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388
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...
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其他好文 时间:
2014-05-06 00:51:29
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353
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...
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其他好文 时间:
2014-05-06 00:22:01
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337
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...
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其他好文 时间:
2014-05-06 00:16:44
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400
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...
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其他好文 时间:
2014-05-06 00:10:57
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335
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...
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其他好文 时间:
2014-05-05 23:55:36
阅读次数:
407
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...
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其他好文 时间:
2014-05-05 23:01:41
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374
# Definition for a binary tree node# class
TreeNode:# def __init__(self, x):# self.val = x# self.left = None# self.right
...
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其他好文 时间:
2014-05-05 22:56:23
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419
Problem
Link:http://oj.leetcode.com/problems/longest-consecutive-sequence/This problem
is a classical problem where we can reduce the running time by ...
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其他好文 时间:
2014-05-05 22:55:22
阅读次数:
552
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...
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其他好文 时间:
2014-05-05 22:46:11
阅读次数:
411