DescriptionDoctor Ghee is teaching Kia how to calculate the sum of two integers. But Kia is so careless and alway forget to carry a number when the su...
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其他好文 时间:
2015-04-19 21:11:16
阅读次数:
163
既然这个是资格赛, 时间也比较充裕, 我就讲解一下我做题的过程
Time Limit:2000ms
Case Time Limit:1000ms
Memory Limit:256MB
Description
Given a string, calculate the number of subsequences that are palindrome. ...
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其他好文 时间:
2015-04-18 13:10:38
阅读次数:
162
1//埃拉托斯特尼筛法23intprime[maxx];4boolis_prime[maxx+1];//is_prime[i]为true表示i为素数56//返回n以内素数的个数7intsieve(intn)8{9intp=0;10for(inti=0;i<=n;i++)is_prime[i]=1;1...
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其他好文 时间:
2015-04-17 21:41:40
阅读次数:
119
简单的dfs,貌似这道题用暴力枚举就可以了,毕竟数据开的是比较小的。#include"iostream"#include"algorithm"#include"stdio.h"#include"string.h"#include"string"#include"vector"#include"cma...
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其他好文 时间:
2015-04-17 18:02:04
阅读次数:
103
Problem DescriptionGiven a sequence a[1],a[2],a[3]......a[n], your job is to calculate the max sum of a sub-sequence. For example, given (6,-1,5,4,-7)...
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其他好文 时间:
2015-04-16 17:17:35
阅读次数:
124
Prime LandTime Limit:1000MSMemory Limit:10000KTotal Submissions:3211Accepted:1473DescriptionEverybody in the Prime Land is using a prime base number s...
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其他好文 时间:
2015-04-16 11:45:47
阅读次数:
157
把所有符合条件的数全部记下来,扫一遍就行了,这类数最多2W来个
/*
ID: 18906421
LANG: C++
PROG: pprime
*/
#include
#include
#include
#include
using namespace std;
const int maxn = 20005;
int a,b;
int cnt = 0;
int prime[maxn];
bool ...
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其他好文 时间:
2015-04-14 21:34:36
阅读次数:
164
Problem Description
Given a circle sequence A[1],A[2],A[3]......A[n]. Circle sequence means the left neighbour of A[1] is A[n] , and the right neighbour of A[n] is A[1].
Now your job is to calculate...
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其他好文 时间:
2015-04-14 19:49:36
阅读次数:
133
问题描述In the New Year 2014, Xiao Ming is thinking about the question: give two integers N and K, Calculate the number of the numbers of satisfy the following conditions:
It is a positive integer and is n...
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其他好文 时间:
2015-04-14 16:42:31
阅读次数:
119
题意:
给gcd(a,b)和lcm(a,b),求a+b最小的a和b。
分析:
miller_rabin素数判定要用费马小定理和二次探测定理。pollard_rho因数分解算法导论上讲的又全又好,网上的资料大多讲不清楚。
代码://poj 2429
//sep9
#include
#include
#include
#define gcc 10007
#define max_prime...
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其他好文 时间:
2015-04-14 08:32:43
阅读次数:
141