KK's Steel 题目链接: http://acm.hust.edu.cn/vjudge/contest/121332#problem/J Description Our lovely KK has a difficult mathematical problem:he has a meters steel,he will cut it into steels as many as possible,and he doesn't want any two of them be the sam…

Problem Description Our lovely KK has a difficult mathematical problem:he has a N(1≤N≤1018) meters steel,he will cut it into steels as many as possible,and he doesn't want any two of them be the same length or any three of them can form a triangle.  …

想了一下发现是斐波那契数列.....水题 #include <stdio.h> #include <algorithm> #include <string.h> #include <queue> #include <stack> #include <map> #include <vector> using namespace std; ; long long n; long long a[maxn]; void init(…

KK's Steel Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 350    Accepted Submission(s): 166 Problem Description Our lovely KK has a difficult mathematical problem:he has a N(1≤N≤1018) meters s…

KK's Steel Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 197    Accepted Submission(s): 90 Problem Description Our lovely KK has a difficult mathematical problem:he has a N(1≤N≤1018) meters st…

题解: 在圆上点三个点时,除圆上三个交点外,圆内没有交点:在圆上点四个点时,除圆上四个交点外,圆内出现了一个交点,因此,在N个点中每四个点便可以在圆内产生一个交点,因此N个点在圆内形成的点的个数为CN4,总的交点数就是CN4+N #pragma comment(linker, "/STACK:1024000000,1024000000") #include<iostream> #include<cstdio> #include<cstring> #i…

HDU 4869 Turn the pokers 题目链接 题意:给定n个翻转扑克方式,每次方式相应能够选择当中xi张进行翻转.一共同拥有m张牌.问最后翻转之后的情况数 思路:对于每一些翻转,假设能确定终于正面向上张数的情况,那么全部的情况就是全部情况的C(m, 张数)之和.那么这个张数进行推理会发现,事实上会有一个上下界,每隔2个位置的数字就是能够的方案,由于在翻牌的时候,相应的肯定会有牌被翻转,而假设向上牌少翻一张,向下牌就要多翻一张.奇偶性是不变的,因此仅仅要每次输入张数,维护上下界,最后…

HDU 4925 Apple Tree 题目链接 题意:给一个m*n矩阵种树,每一个位置能够选择种树或者施肥,假设种上去的位置就不能施肥,假设施肥则能让周围果树产量乘2.问最大收益 思路:推理得到肯定是果树和肥料交叉种好,类似国际象棋棋盘,黑的种,白的施肥.因为格子数不多,直接去枚举每一个位置就可以.假设题目格子数多的话.事实上也能够推出公式一步得到答案 代码: #include <cstdio> #include <cstring> const int d[4][2] = {{0…

HDU 4924 Room and Moor 题目链接 题意:给定一个01组成的a序列.要求一个b序列,b序列每一个数值为[0, 1]之间的数,而且b序列为非递减序列,要求∑(ai−bi)2最小,求这个最小值 思路:推理,非常easy看出,开头一段的0和末尾一段的1等于没有.然后中间每段相似111000这样1在前,0在后的序列.都能够列出一个公式,非常easy推出选择的x为共同的一个值,为1的个数/(1的个数+0的个数)a,那么问题就变成要维护一个递增的x.利用一个栈去做维护,假设遇到一个位置递…

KK's Number 题目链接: http://acm.hust.edu.cn/vjudge/contest/121332#problem/K Description Our lovely KK has a funny mathematical game:This game requires two people,There are numbers,every time KK will take the numbers,first.Every time you can take any num…