ural 2029 Towers of Hanoi Strike Back 链接:http://acm.timus.ru/problem.aspx?space=1&num=2029 题意:汉诺塔问题,给定一串只有(A, B, C)的字符串(A代表在第一根柱子,B代表在第二根柱子,C代表在第三根柱子),从前往后代表盘子的大小,第 i 个字母代表di i 个盘子在某个柱子上.问移动给定字母状态的盘子最少需要多少步. 思路:首先,从后往前看(最大的盘子),如果不在当前柱子上,那么移动到目标柱子需要 2…

E. Mahmoud and Ehab and the xor-MST dp/数学/找规律 题意 给出一个完全图的阶数n(1e18),点由0---n-1编号,边的权则为编号间的异或,问最小生成树是多少 思路 由于一个数k和比他小的数异或,一定可以取到k与所有正整数形成的异或值的最小值.这里简单得形式化证明一下 假设一个数为1000110 那么他的最佳异或和为010(即留下最靠近右边的1其他全部置0) 我们定义\(lsb(x)=x\And(-x)\)由字符形的变量编码我们可以知道,这就可以取得x最…

Problem The Tower of Hanoi puzzle was invented by French mathematician Édouard Lucas in the second half of the 19th century. Here is its formulation. There are three rods, denoted by the letters A, B, and C, and n disks of different integer sizes fro…

题目传送门 /* 数学/暴力:只要一个数的最后三位能被8整除,那么它就是答案:用到sprintf把数字转移成字符读入 */ #include <cstdio> #include <algorithm> #include <cstring> #include <iostream> #include <cmath> #include <vector> using namespace std; ; const int INF = 0x3f3…

Triangle 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5914 Description Mr. Frog has n sticks, whose lengths are 1,2, 3⋯n respectively. Wallice is a bad man, so he does not want Mr. Frog to form a triangle with three of the sticks here. He decides…

2037. Richness of binary words 题目连接: http://acm.timus.ru/problem.aspx?space=1&num=2037 Description For each integer i from 1 to n, you must print a string si of length n consisting of letters 'a' and 'b' only. The string si must contain exactly i dis…

传送门: http://acm.hdu.edu.cn/showproblem.php?pid=1273 漫步森林 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3508    Accepted Submission(s): 2339 Problem Description Gardon和小希每天晚上都喜欢到屋外的森林里散步,设森林里有N…

观察一下序列,每3个数一组,第一个数余1,不能,加第二个数后整除(第二个数本身余2),第三数恰整除.一行代码的事.011011011.... #include<iostream> using namespace std; int main() { int n; while(cin>>n) { cout<<n/3*2+(n%3==2?1:0)<<endl; } return 0; }…

A - Jzzhu and Sequences   Jzzhu has invented a kind of sequences, they meet the following property: You are given x and y, please calculate fn modulo 1000000007 (109 + 7). Input The first line contains two integers x and y (|x|, |y| ≤ 109). The secon…

Time Limit: 1000 MS In mathematics, the factorial of a positive integer number n is written as n! and is de ned as follows: n! = 1  2  3  4  : : :  (n  1)  n = ∏n i=1 i The value of 0! is considered as 1. n! grows very rapidly with the increase…

I was trying to solve problem '1234 - Harmonic Number', I wrote the following code long long H( int n ) {    long long res = 0;    for( int i = 1; i <= n; i++ )        res = res + n / i;    return res;} Yes, my error was that I was using the integer…

Detachment Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1686    Accepted Submission(s): 467 Problem Description In a highly developed alien society, the habitats are almost infinite dimension…

Description You all must know the puzzle named "The Towers of Hanoi". The puzzle has three pegs and N discs of different radii, initially all disks are located on the first peg, ordered by their radii - the largest at the bottom, the smallest at…

3.4 In the classic problem of the Towers of Hanoi, you have 3 towers and N disks of different sizes which can slide onto any tower. The puzzle starts with disks sorted in ascending order of size from top to bottom (i.e., each disk sits on top of an e…

Strange Towers of Hanoi 大体意思是要求\(n\)盘4的的hanoi tower问题. 总所周知,\(n\)盘3塔有递推公式\(d[i]=dp[i-1]*2+1\) 令\(f[i]\)为4塔转移步骤. \(f[i]=min(f[i],f[k]*2+d[i-k])\) 即先以4塔以上面的\(k\),再以3塔移\(i-k\),最后以4塔移动回去. 可以推广到\(n\)盘\(m\)塔 2018.5.26…

Strange Towers of Hanoi Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 3784 Accepted: 2376 Description Background  Charlie Darkbrown sits in another one of those boring Computer Science lessons: At the moment the teacher just explains the…

Strange Towers of Hanoi Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 2677 Accepted: 1741 Description Background Charlie Darkbrown sits in another one of those boring Computer Science lessons: At the moment the teacher just explains the…

题目传送门 Strange Towers of Hanoi Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 3117   Accepted: 2004 Description Background Charlie Darkbrown sits in another one of those boring Computer Science lessons: At the moment the teacher just exp…

Towers of Hanoi Time Limit: 3000MS   Memory Limit: 16000K Total Submissions: 2213   Accepted: 986 Case Time Limit: 1000MS Description Surely you have already come across the Towers of Hanoi problem: Wooden disks of different sizes are stacked on thre…

The Towers of Hanoi Revisited Time Limit: 5 Seconds Memory Limit: 32768 KB Special Judge You all must know the puzzle named ��The Towers of Hanoi��. The puzzle has three pegs and N discs of different radii, initially all disks are located on the firs…

A. Hanoi tower Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100114 Description you the conditions of this task. There are 3 pivots: A, B, C. Initially, n disks of different diameter are placed on the pivot A: the smallest dis…

UVa10025 ? 1 ? 2 ? ... ? n = k problem The problem Given the following formula, one can set operators '+' or '-' instead of each '?', in order to obtain a given k? 1 ? 2 ? ... ? n = k For example: to obtain k = 12 , the expression to be used will be:…

题解: 考场上靠打表找规律切的题,不过严谨的数学推导才是本题精妙所在:求:$\sum\prod_{i=1}^{m}F_{a{i}}$ 设 $f(i)$ 为 $N=i$ 时的答案,$F_{i}$ 为斐波那契数列第 $i$ 项.由于 $a$ 序列是有序的,要求的答案可以表示成:$f(i)=\sum_{j=1}^{i}f(j)*F_{i-j}$由于斐波那契数列第 0 项是 0,显然可以表示成:$f(i)=\sum_{j=1}^{i-1}f(j)*F_{i-j}$考虑一下 $f(i+1)$ 和 $f(i…

The teacher points to the blackboard (Fig. 4) and says: "So here is the problem: There are three towers: A, B and C. There are n disks. The number n is constant while working the puzzle. All disks are different in size. The disks are initially stacke…

转载请注明出处,谢谢http://blog.csdn.net/ACM_cxlove?viewmode=contents    by---cxlove 题意 :n个圆盘,m个柱子的汉诺塔输出步骤. http://acm.sgu.ru/problem.php?contest=0&problem=202 经典的递归问题,见具体数学第一章 先DP求出最短步骤,并记录路径. 然后 递归输出. import java.util.*; import java.io.*; import java.math.*;…

ural 2032  Conspiracy Theory and Rebranding 链接:http://acm.timus.ru/problem.aspx?space=1&num=2032 题意:给定一个三角形的三条边 (a, b, c),问是否可放在二维坐标,使得3个顶点都是整数点.若可以,输出任意一组解,否则,输出 -1. 思路:暴力枚举:以 a 为半径做第一象限的 1/4 圆, 以 b 为半径做 一.四 象限的半圆,存储整数点的解,暴力枚举 a 整数点与 b 整数点是否构成长度为 c…

在这里我们将构造一个基于HT for Web的HTML5+JavaScript来实现汉诺塔游戏. 汉诺塔的游戏规则及递归算法分析请参考http://en.wikipedia.org/wiki/Tower_of_Hanoi. 知道了汉诺塔的规则和算法,现在就开始创建元素.用HT for Web(http://www.hightopo.com)现有的3D模板创建底盘和3根柱子不是问题,问题是要创建若干个中空的圆盘.一开始的想法是:创建一个圆柱体,将圆柱体的上下两端隐藏,设置柱面的宽度来实现圆盘的效果…

Your mission is to move the stack from the left peg to the right peg. The rules are well known: Only one disk may be moved at a time. Each move consists of taking the upper disk from one of the pegs and sliding it onto another rod, on top of the othe…

题意:给定N(1<= N <=64)个盘子和M(4<= M <= 65)根柱子,问把N个盘子从1号柱子移动到M号柱子所需要的最少步数,并且输出移动过程. 分析:设f[i][j]表示将i个盘通过j个柱子从第一根柱子移动到最后一根柱子所需要的最少次数,f[i][j]的得到的最优移动方案是先将最小的path[i][j]个盘移动到某一根柱子上,然后通过一个dfs输出移动次序. #include <cstdlib> #include <cstring> #includ…

题意:给定 n 个人,每个人两个值s, r,要满足,p(v, u) = sqrt((sv − su)^2 + (rv − ru)^2), p(v,u,w) = (p(v,u) + p(v,w) + p(u,w)) / 2 要求找出p(v, u) ≥ p(v,u,w) 的对数,其中w是除u,v外,任意的人. 析:化简一下这个表达式,这很明显是两边之和小于等于第三边,好像挺熟悉啊,对,三角形是两边之和大于第三边,现在是小于,不可能,只能是等于,要想等于, 那么只是共线了,并且w是任何人,所以这些点全…