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Triangle
Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below.For example, given the fol...
分类:其他好文   时间:2014-07-09 23:00:38    阅读次数:208
leetcode题解:Valid Palindrome(判断回文)
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: P...
分类:其他好文   时间:2014-07-09 21:38:15    阅读次数:207
CTCI 2.5
You have two numbers represented by a linked list, where each node contains a single digit. The digits are stored in reverse order, such that the Ts d...
分类:其他好文   时间:2014-07-09 15:35:19    阅读次数:176
【LeetCode】Sum Root to Leaf Numbers
题目 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 represents the number 123. Find ...
分类:其他好文   时间:2014-07-08 21:43:08    阅读次数:219
hdu 4722 Good Numbers(初涉数位dp)
http://acm.hdu.edu.cn/showproblem.php?pid=4722 大致题意:若一个整数的各位数字之和是10的倍数,称这个数为"good number"。给出区间[A,B],求出该区间内"good number"的数的个数。 第一道数位dp,折腾了半天才明白怎么回事。 设dp[site][mod]表示到第site位(由高位向低位)前面各位数字之和对1...
分类:其他好文   时间:2014-07-08 20:46:41    阅读次数:223
HDU 4325 Vampire Numbers 打表
杭电服务器是慢啊。。 #include #include #include #include #include #include #include #include using namespace std; #define ll long long #define N 1000005 sets; ll ans[1783]={ 126,153,688,1206,1255,1260,...
分类:其他好文   时间:2014-07-08 18:58:12    阅读次数:252
Cracking the Coding Interview Q2.7
检测链表是否是palindrome.思路1:翻转并比较。思路2:迭代。思路3:递归。 public static boolean isPalindrome(LinkedListNode head) { LinkedListNode fast = head; Link...
分类:其他好文   时间:2014-07-08 17:15:57    阅读次数:267
判断一个整数是否为回文数 Check if a number is palindrome
一种方法是先翻转当前数,然后把它和原数比较(略)另一种是递归方法,借用一个复制数,对原数递归,使之翻转,然后配合复制数比较package recursion; public class Check_if_a_number_is_palindrome { public static void main(String[] args) { int num = 121321; System....
分类:其他好文   时间:2014-07-08 17:13:55    阅读次数:188
Cracking the Coding Interview Q2.5
You have two numbers represented by a linked list, where each node contains a single digit. The digits are stored in reverse order, such that the 1’s ...
分类:其他好文   时间:2014-07-08 13:34:40    阅读次数:195
POJ 1159 Palindrome
Palindrome Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 51518   Accepted: 17733 Description A palindrome is a symmetrical string, that is, a string read...
分类:其他好文   时间:2014-07-08 10:56:08    阅读次数:204
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