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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
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
python学习(3)
Python学习(3)切片(Slice):根据索引范围取出字符串里面的内容,比如: l=range(100) l[:8] [0, 1, 2, 3, 4, 5, 6, 7] l[:10:2] [0, 2, 4, 6, 8]list、tuple、set 、字符串都可以做切片操作迭代(iteration)...
分类:编程语言   时间:2014-07-09 14:48:16    阅读次数:160
【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
【剑指offer】Q9:斐波那契数列
def Fibonacci(n): if n <= 0: return 0 if n <= 1: return n f0 = 0; f1 = 1 for i in range(2, n + 1): fn = f0 + f1 f0 = f1 f1 = fn return fn...
分类:其他好文   时间:2014-07-08 16:42:03    阅读次数:163
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
SWIFT学习笔记05
1、Swift 无需写break,所以不会发生这种贯穿(fallthrough)的情况。 2、//用不到变量名,可用“_”替换 for _ in 1...power { answer *= base } 3、case 可以匹配更多的类型模式,包括区间匹配(range matching),元组(tuple)和特定类型的描述。 可以这样用case case 1...3: natura...
分类:其他好文   时间:2014-07-06 00:52:44    阅读次数:194
LeetCode之Decode Ways
A message containing letters from A-Z is being encoded to numbers using the following mapping: 'A' -> 1 'B' -> 2 ... 'Z' -> 26 Given an encoded message containing digits, determine the total numb...
分类:其他好文   时间:2014-07-05 23:41:41    阅读次数:253
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