题目传送门 /* 已知一向量为(x , y) 则将它旋转θ后的坐标为(x*cosθ- y * sinθ , y*cosθ + x * sinθ) 应用到本题,x变为(xb - xa), y变为(yb - ya)相对A点的位置,即B绕着A点旋转60度至C点 注意:计算后加回A点的坐标才是相对于原点的坐标 详细解释:http://www.tuicool.com/articles/FnEZJb */ #include <cstdio> #include <cmath> #include…
2013年山东省赛F题 Mountain Subsequences先说n^2做法,从第1个,(假设当前是第i个)到第i-1个位置上哪些比第i位的小,那也就意味着a[i]可以接在它后面,f1[i]表示从第一个开始,以a[i]为结尾的不同递增序列的个数,要加上1,算上本身.正反各跑一遍,答案加一下(f1[i]-1)*(f2[i]-1)优化就是,比a[i]小的,只有a[i]-1个 #include<iostream> #include<cstdio> #include<queue&…
A.Rescue The PrincessDescription Several days ago, a beast caught a beautiful princess and the princess was put in prison. To rescue the princess, a prince who wanted to marry  the princess set out immediately. Yet, the beast set a maze. Only if the…
Rescue The Princess Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 412  Solved: 168 [Submit][Status][Web Board] Description Several days ago, a beast caught a beautiful princess and the princess was put in prison. To rescue the princess, a prince wh…
题目传送门 /* 题意:每支队伍需求打印机打印n张纸,当打印纸数累计到s时,打印机崩溃,打印出当前打印的纸数,s更新为(s*x+y)%mod 累计数清空为0,重新累计 模拟简单题:关键看懂题意 注意:打印机一张一张纸打印,当某支队伍打印完正好累计到s时,要输出0,坑点! */ #include <cstdio> #include <cmath> #include <algorithm> #include <iostream> #include <cst…
题目传送门 /* 题意: 求(a0*x^(2^0)+1) * (a1 * x^(2^1)+1)*.......*(an-1 * x^(2^(n-1))+1) 式子中,x的p次方的系数 二进制位运算:p = 2 ^ i + 2 ^ j + 2 ^ k + ...,在二进制表示下就是1的出现 例如:10 的二进制 为1010,10 = 2^3 + 2^1 = 8 + 2,而且每一个二进制数都有相关的a[i],对p移位运算,累计取模就行了 */ #include <cstdio> #include…
Rescue The Princess Time Limit: 1000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述 Several days ago, a beast caught a beautiful princess and the princess was put in prison. To rescue the princess, a prince who wanted to marry the princess set out immedia…
http://acm.sdibt.edu.cn/JudgeOnline/problem.php?id=3230 Description Several days ago, a beast caught a beautiful princess and the princess was put in prison. To rescue the princess, a prince who wanted to marry  the princess set out immediately. Yet,…
Rescue The Princess Time Limit: 1 Sec  Memory Limit: 128 MBSubmit: 412  Solved: 168[Submit][Status][Web Board] Description Several days ago, a beast caught a beautiful princess and the princess was put in prison. To rescue the princess, a prince who…
Alice and Bob Time Limit: 1000ms   Memory limit: 65536K 题目描述 Alice and Bob like playing games very much.Today, they introduce a new game. There is a polynomial like this: (a0*x^(2^0)+1) * (a1 * x^(2^1)+1)*.......*(an-1 * x^(2^(n-1))+1). Then Alice as…
点击打开链接 2226: Contest Print Server Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 53  Solved: 18 [Submit][Status][Web Board] Description In ACM/ICPC on-site contests ,3 students share 1 computer,so you can print your source code any time. Here you ne…
转载请注明出处: http://www.cnblogs.com/fraud/          ——by fraud 2224: Boring Counting Time Limit: 3 Sec  Memory Limit: 128 MB Description In this problem you are given a number sequence P consisting of N integer and Pi is the ith element in the sequence.…
triangle(第8届山东省赛的某题) 传送门 题意:喵了个呜,这题意真是峰回路转啊.懒死了,不想描述. 做法:我们拿set或线段树维护exp的最小值,每次取出exp值最小的边,删除之.并更新这条边所在的三元环的另外两条边的exp. nice(每次取出的边)就等于前缀最大值啦. set维护版本 #include <iostream> #include <algorithm> #include <cstdio> #include <vector> #incl…
/*——————————————————————————————————————————————————————————— 题目:2013 高斯日记T-1 问题描述: 大数学家高斯有一个好习惯:无论如何都要记日记. 他的日记有一股与众不同的地方,他从不注明年月日,而是用一个整数代替: 比如4210.后来人们知道,那个整数是日记,他代表高斯出生后的第几天, 这或许也是好习惯,他时刻提醒着主人:日记又过去一天,还有多少时光 可以浪费呢?高斯出生于:1777年4月30日. 在高斯发现一个重要定理的日记…
2013年省赛H题你不能每次都快速幂算A^x,优化就是预处理,把10^9预处理成10^5和10^4.想法真的是非常巧妙啊N=100000构造两个数组,f1[N],间隔为Af2[1e4]间隔为A^N,中间用f1来填补f[x]=f1[x%N]*f2[x/N]%P; #include<iostream> #include<cstdio> #include<queue> #include<algorithm> #include<cmath> #inclu…
2013年省赛I题判断单向联通,用bfs剪枝:从小到大跑,如果遇到之前跑过的点(也就是编号小于当前点的点),就o(n)传递关系. bfs #include<iostream> #include<cstdio> #include<queue> #include<algorithm> #include<cmath> #include<ctime> #include<set> #include<map> #inclu…
HEX SDUT 3896 17年山东省赛D题这个题是从矩形的左下角走到右上角的方案数的变形题,看来我对以前做过的题理解还不是太深,或者是忘了.对于这种题目,直接分析它的性质就完事了.从(1,1)走到(a,b)向左走的步数和向右走的步数是确定的,向下是代表向左向右各走了一步.细节:利用对称性,线性推逆元 对于每一种情况,向左下.向右下.向下的次数都是确定的,然后,对于每一种方向内部顺序不用考虑,然后排列组合就完事了对称性上又出错了,哎,自己也没找个小数据试一下,就...(a,b)和(a,a-b+…
2018山东省赛sequence因为必须要删除一个数,所以可以计算每个数删除的代价,从而选取代价最小的进行删除如果一个数大于它前面的所有数的最小值而小于次小值,删除最小值的代价就要+1:如果一个数本身就是good数,那么该数代价就要加一 #include<iostream> #include<cstdio> #include<queue> #include<algorithm> #include<cmath> #include<ctime&…
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4816 2013长春区域赛的D题. 很简单的几何题,就是给了一条折线. 然后一个矩形窗去截取一部分,求最大面积. 现场跪在这题,最后时刻TLE到死,用的每一小段去三分,时间复杂度是O(n log n) , 感觉数据也不至于超时. 卧槽!!!!代码拷回来,今天在HDU一交,一模一样的代码AC了,加输入外挂6s多,不加也8s多,都可AC,呵呵·····(估计HDU时限放宽了!!!) 现场赛卡三分太SXBK…
Theme Section Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 271    Accepted Submission(s): 121 Problem Description It's time for music! A lot of popular musicians are invited to join us in the…
Stone Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 179    Accepted Submission(s): 137 Problem Description Tang and Jiang are good friends. To decide whose treat it is for dinner, they are pla…
Cut the Cake Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 300    Accepted Submission(s): 135 Problem Description MMM got a big big big cake, and invited all her M friends to eat the cake toge…
Poker Shuffle Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 95    Accepted Submission(s): 24 Problem Description Jason is not only an ACMer, but also a poker nerd. He is able to do a perfect s…
Flyer Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 386    Accepted Submission(s): 127 Problem Description The new semester begins! Different kinds of student societies are all trying to adver…
Divide Groups Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 423    Accepted Submission(s): 161 Problem Description   This year is the 60th anniversary of NJUST, and to make the celebration mor…
Count The Pairs Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 277    Accepted Submission(s): 150 Problem Description   With the 60th anniversary celebration of Nanjing University of Science…
Walk Through Squares Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 200    Accepted Submission(s): 57 Problem Description   On the beaming day of 60th anniversary of NJUST, as a military colleg…
Two Rabbits Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 505    Accepted Submission(s): 260 Problem Description Long long ago, there lived two rabbits Tom and Jerry in the forest. On a sunny…
Mex Time Limit: 15000/5000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 623    Accepted Submission(s): 209 Problem Description Mex is a function on a set of integers, which is universally used for impartial game t…
Save Labman No.004 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 624    Accepted Submission(s): 154 Problem Description Due to the preeminent research conducted by Dr. Kyouma, human beings hav…