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projecteuler---->problem=5----Smallest multiple n个数求最小公倍数
title: 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What is the smallest positive number that is evenly divisible by all of the nu...
分类:其他好文   时间:2014-06-07 01:27:37    阅读次数:229
projecteuler---->problem=4----Largest palindrome product
title: Largest palindrome product Problem 4 A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 99. Find the l...
分类:其他好文   时间:2014-06-07 01:24:27    阅读次数:398
projecteuler---->problem=7----10001st prime
title: By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13. What is the 10 001st prime number? 翻译: 通过列出前6个质数,我们可知第6个质数是13。 那么第10001个质数是...
分类:其他好文   时间:2014-06-05 12:28:28    阅读次数:277
ACM-数论之Big Number——hdu1018
ACM 数论 Big Number hdu1018 斯特林公式...
分类:其他好文   时间:2014-06-05 08:41:41    阅读次数:149
数据库设计--数据的垂直拆分
如果表字段太多,如果表中有些字段比较大,即便是你只查有限的几个字段,在做表关联和全表扫的时候,由于扫描的数据块多,性能方面还是会不理想。因为oracle扫描的时候是按照块为单位扫描,读取的时候也是按块为单位读取,所以这种功能无法在SQL层面上优化的时候,可以考虑做数据的垂直切分,下面来做个试验: --制造数据不做垂直切分 create table test(   a number,  ...
分类:数据库   时间:2014-06-05 06:12:44    阅读次数:356
POJ 3259 Wormholes (图论---最短路 Bellman-Ford || SPFA)
链接:http://poj.org/problem?id=3259 Description While exploring his many farms, Farmer John has discovered a number of amazing wormholes. A wormhole is very peculiar because it is a one-way path t...
分类:其他好文   时间:2014-06-05 05:26:33    阅读次数:240
LeetCode: Plus One [067]
【题目】 Given a non-negative number represented as an array of digits, plus one to the number. The digits are stored such that the most significant digit is at the head of the list. 【题意】 给定一个非负整数,这个表示为一个数字数组。计算这个整数加1后的值。 【思路】 从低位到高位依次相加,注意处理进...
分类:其他好文   时间:2014-06-05 01:24:44    阅读次数:250
LeetCode: Valid Number [066]
【题目】 Validate if a given string is numeric. Some examples: "0" => true " 0.1 " => true "abc" => false "1 a" => false "2e10" => true Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before imple...
分类:其他好文   时间:2014-06-04 23:45:09    阅读次数:388
C++ this与const,const_cast,static_cast的关系
一、整体代码 #include using namespace std; class CCTest { public: void setNumber( int ); void printNumber() const ; private: int number; }; void CCTest::setNumber( int num ) { number = num; } ...
分类:编程语言   时间:2014-06-04 23:17:34    阅读次数:415
【HDOJ】1394 Minimum Inversion Number
逆序数的性质。1. 暴力解 1 #include 2 3 #define MAXNUM 5005 4 5 int a[MAXNUM]; 6 7 int main() { 8 int n; 9 int i, j, sum, min;10 11 while (scanf(...
分类:其他好文   时间:2014-05-31 07:50:50    阅读次数:170
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