https://cn.vjudge.net/problem/LightOJ-1121 #include<cstdio> #include<algorithm> #include<cstring> #include<vector> using namespace std; #define fi first #define se second #define mp make_pair #define pb push_back typedef long long…

大家好!这是我的第一篇博客,由于之前没有撰写博客的经验,并且也是初入计算机和人工智能领域,可能有些表述或者理解不当,还请大家多多指教. 一.撰写目的 由于这个学期在上算法与数据结构课程的时候,其中一个大作业是用C语言和深度优先(DFS)的 IDA*(基于迭代加深的A*算法)实现快速寻求15Puzzle(4乘4迷题)的解法的工具,同时尽可能地加入优化使得算法尽可能快速.简练.我发现网上很少有关于利用IDA*去解决15乃至24Puzzle的介绍,于是我就想跟大家分享一下自己的学习经验和解决方法,文章…

实现算法: 1. JavaScript动态生成拼图:通过生成16个div,且除最后一个div不使用背景图片以外,其他div都设置拼图图片为背景.然后通过调整background-position来实现效果图中的拼图效果: 2. 打乱拼图:定义一个大小为15的数组,且其中的值依次为1-15,然后通过定义一个比较函数,利用sort(cmp)实现随机打乱,也就生成了一个随机数组,然后根据这个数组改变类名,定义拼图分块的位置: function cmp() { return 0.5-Math.rando…

代码地址如下:http://www.demodashi.com/demo/11505.html 一.准备工作 先了解一个定义和定理 定义:在一个1,2,...,n的排列中,如果一对数的前后位置与大小顺序相反,即前面的数大于后面的数,那么它们就称为一个逆序.一个排列中逆序的总数就称为这个排列的逆序数.逆序数为偶数的排列称为偶排列:逆序数为奇数的排列称为奇排列.如2431中,21,43,41,31是逆序,逆序数是4,为偶排列.--这是北大<高等代数>上的定义. 定理:交换一个排列中的两个数,则排列…

A - Bi-shoe and Phi-shoe Time Limit:2000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1370 Appoint description:  System Crawler  (2016-07-08) Description Bamboo Pole-vault is a massively popular sport in X…

B - Pairs Forming LCM Time Limit:2000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1236 Description Find the result of the following code: long long pairsFormLCM( int n ) {    long long res = 0;    for( in…

题目链接:http://lightoj.com/volume_showproblem.php?problem=1289 题意:求LCM(1, 2, 3, ... , n)%(1<<32), (1<n<=1e8); LCM(1, 2, 3, ... , n) = n以内所有素数的最高次幂之积,例如15: 23*32*5*7*11*13 = 36360360; 为了防止TLE所以,要有一个数组表示前缀积,但是直接开LL会MLE是,因为有个%1<<32刚好是unsigned…

题目链接:http://lightoj.com/volume_showproblem.php?problem=1278 题意:给你一个数n(n<=10^14),然后问n能用几个连续的数表示; 例如: 15 = 7+8 = 4+5+6 = 1+2+3+4+5,所以15对应的答案是3,有三种; 我们现在相当于已知等差数列的和sum = n, 另首项为a1,共有m项,那么am = a1+m-1: sum = m*(a1+a1+m-1)/2  -----> a1 = sum/m - (m-1)/2 a…

http://www.lightoj.com/volume_showproblem.php?problem=1013   Yes, you are developing a 'Love calculator'. The software would be quite complex such that nobody could crack the exact behavior of the software. So, given two names your software will gene…

CoolShell博主陈皓做了一个在线的puzzle很有意思,链接在这里,这里记录一下解题的一些步骤. Puzzle 0 ++++++++[>+>++>+++>++++>+++++>++++++>+++++++>++++++++>+++++++++>++++++++++>+++++++++++>++++++++++++>+++++++++++++>++++++++++++++>+++++++++++++++>+…

http://lightoj.com/volume_showproblem.php?problem=1236 Pairs Forming LCM Time Limit:2000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1236 Description Find the result of the following code: long long pairs…

http://lightoj.com/volume_showproblem.php?problem=1245 G - Harmonic Number (II) Time Limit:3000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1245 Description I was trying to solve problem '1234 - Harmonic…

http://lightoj.com/volume_showproblem.php?problem=1336 Sigma Function Time Limit:2000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1336 Description Sigma function is an interesting function in Number Theor…

http://lightoj.com/volume_showproblem.php?problem=1370 Bi-shoe and Phi-shoe Time Limit:2000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1370 Description Bamboo Pole-vault is a massively popular sport in X…

题目链接:http://lightoj.com/volume_showproblem.php?problem=1132 题意:给出n和m.求sum(i^m)%2^32.(1<=i<=n) (1<=n<=10^15,0<=m<=50). 思路:本题有两种方法:二分和矩阵. (1)二分:设我们用DFS(n,m)来计算上面的式子.假如n为奇数,比如n=13,那么我们单独计算13^m,那么剩下的是n=12.前一半是DFS(6,m),后一半是7^m+8^m+……12^m. 进而n…

Matches Puzzle Game Problem Description As an exciting puzzle game for kids and girlfriends, the Matches Puzzle Game asks the player to find the number of possible equations A−B=C with exactly n (5≤n≤500) matches (or sticks).In these equations, A,B a…

F - Eight Puzzle Time Limit: 3000/1000MS (Java/Others)     Memory Limit: 65535/65535KB (Java/Others) Submit Status The 15-puzzle has been around for over 100 years; even if you don't know it by that name, you've seen it. It is constructed with 15 sli…

题目链接:http://codeforces.com/gym/101981/problem/K Your friend has made a computer video game called “Kangaroo Puzzle” and wants you to give it a try for him. As the name of this game indicates, there are some (at least 2) kangaroos stranded in a puzzle…

题意 英文版题面 Problems Submit Status Standings Custom test .input-output-copier { font-size: 1.2rem; float: right; color: #888 !important; cursor: pointer; border: 1px solid rgb(185, 185, 185); padding: 3px; margin: 1px; line-height: 1.1rem; text-transfor…

关于bug更全的,我推荐去这个网站hasLayout,整理的非常全!三年前就看了,最近手生,又翻出来看看~~虽然上面有很多bug讲解,但是我觉得目前用的比较多或者说是常见的应该属下面这篇文章,15 annoying Internet Explorer 6 bugs + simple solutions,我翻译了一下与大家共分享!写代码的时候,自己习惯的避过不这样,久了也不记得原因了,这次温习了.里面有自己的一些补充修改,并未完全按照原文来翻译! 开篇这段话,点名了IE6的重要性!插入,本人重申自…

1118 - Incredible Molecules   PDF (English) Statistics Forum Time Limit: 0.5 second(s) Memory Limit: 32 MB In the biological lab, you were examining some of the molecules. You got some interesting behavior about some of the molecules. There are some…

版权声明:本文为博主原创文章,未经博主同意不得转载. https://blog.csdn.net/SunnyYoona/article/details/25840365 [题目] A sequence of N positive integers (10 < N < 100 000), each of them less than or equal 10000, and a positive integer S (S < 100 000 000) are given. Write a p…

52张扑克牌,问拿到指定数量的4个花色的最少次数期望是多少,其中拿到joker必须马上将其视作一种花色,且要使后续期望最小. 转移很容易想到,主要是两张joker的处理,一个状态除了普通的4个方向的转移,当没拿到joker时还要增加拿到joker的期望,根据题意直接在当前状态下找最小的期望计算即可. /** @Date : 2017-08-29 17:58:59 * @FileName: LightOJ 1364 概率DP.cpp * @Platform: Windows * @Author :…

LINK 题意:类似POJ的宫殿围墙那道,只不过这道题数据稍微强了一点,有共线的情况 思路:求凸包周长加一个圆周长 /** @Date : 2017-07-20 15:46:44 * @FileName: LightOJ 1239 求凸包.cpp * @Platform: Windows * @Author : Lweleth (SoungEarlf@gmail.com) * @Link : https://github.com/ * @Version : $Id$ */ #include <s…

Eight Puzzle Time Limit: 20 Sec  Memory Limit: 256 MB 题目连接 http://acm.uestc.edu.cn/#/contest/show/61 Description The 15-puzzle has been around for over 100 years; even if you don't know it by that name, you've seen it. It is constructed with 15 slidi…

http://www.lightoj.com/volume_showproblem.php?problem=1278 题意:问一个数n能表示成几种连续整数相加的形式 如6=1+2+3,1种. 思路:先列式子\(N=a+(a+1)+(a+2)+ ...+(a+k-1)=\frac{k·(2a+k-1)}{2} \) 继续化成\(2a-1=\frac{2N}{k} - k \) 可由左式得知,2a-1必为奇数,那么右式必定是一奇一偶,且都为2N的因子.所以只要分解因子记录个数,最后组合求一下即可.…

24 Puzzle Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65768/65768 K (Java/Others) Total Submission(s): 1306    Accepted Submission(s): 381 Problem Description Daniel likes to play a special board game, called 24 puzzle. 24 puzzle is such…

Where to Run LightOJ - 1287(概率dp) 题面长长的,看了半天也没看懂题意 不清楚的地方,如何判断一个点是否是EJ 按照我的理解 在一个EJ点处,要么原地停留五分钟接着走,要么直接走,但是这样样例都对不上 mmp,原来是说,在原地停留五分钟后再继续这两种选择 而且题目问的是 求被警察抓的期望时间,实际上却是求遍历完整张图的期望时间,也就是说总是会走是EJ的点 对于每个点来说从该点出发的期望时间\(dp[i] = \frac{dp[i]+5}{cnt+1} + \frac…

problem=1068">http://www.lightoj.com/volume_showproblem.php?problem=1068 求出区间[A,B]内能被K整除且各位数字之和也能被K整除的数的个数.(1 ≤ A ≤ B < 231 and 0 < K < 10000) 算是最简单的数位dp了.k在这里是10000.三维数组都开不开.可是想想会发现A,B最多有10位,各位数字之和不会超过90.那么当 k >= 90时,就不用dp,由于个位数字之和对k取…

传送门:http://www.lightoj.com/volume_showproblem.php?problem=1030 Discovering Gold Time Limit: 2 second(s) Memory Limit: 32 MB Program Description You are in a cave, a long cave! The cave can be represented by a 1 x N grid. Each cell of the cave can con…