Gym 101047K Training with Phuket's larvae Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Practice Description standard input/output Thai cuisine is known for combining seasonings so that every dish has flavors that are…

http://codeforces.com/gym/101047/problem/K 题目:给定n<=2000条绳子,要你找出其中三条,围成三角形,并且要使得围成的三角形面积最小 思路: 考虑一下三角形面积公式1/2a*b*sinO ,那么可以暴力枚举两条边,第三条边要尽量小,为什么呢?因为我要使得O角尽量小.sin值也小了.这是根据小边对小角得到的.所以要找到第一条>a-b的.这样就能使结果最优.这个找可以用二分啦.同理找一个<a+b的 #include <cstdio>…

UVA 1394 And Then There Was One / Gym 101415A And Then There Was One / UVAlive 3882 And Then There Was One / POJ 3517 And Then There Was One / Aizu 1275 And Then There Was One (动态规划,思维题) Description Let's play a stone removing game. Initially, n ston…

暑假杭电多校第一场,这一场是贪心场,很多贪心的题目,但是自己太菜,姿势挫死了,把自己都写吐了... 2018 Multi-University Training Contest 1 HDU6298.Maximum Multiple 题目意思就是给你一个n,找出来三个数x,y,z, 使得n=x+y+z,而且x,y,z都是n的因数,并且x*y*z为最大值,让你输出来x*y*z的最大值.如果没有满足条件的情况就输出-1. 由1=1/2+1/3+1/6=1/3+1/3+1/3=1/2+1/4+1/4,所…

题目传送门 /* 题意:一个n×m的矩形,相邻的颜色不同,黑或白.问最少的翻转次数,每次翻转可指定任意一个子矩形 思维题:最少要把偶数行和列翻转,也就是n/2+m/2次 */ #include <cstdio> using namespace std; int main(void) //Gym 100553A Alter Board { // freopen ("A.in", "r", stdin); freopen ("alter.in&qu…

题目链接:https://codeforces.com/gym/102392/problem/F 题意:被这题题意坑了很久,大意是说有一棵根为 \(1\) 的树,每个节点初始都是白色, \(Alice\) 能在这棵树的某个节点放下一个棋子,并使得该节点变为黑色,然后从 \(Bob\) 开始,两人能轮流移动这个棋子到当前所在节点的任意一个白色的祖先或者后代节点(不需要相邻的节点),并且将移动到的节点染为黑色.谁先不能移动就输了. 分析:看到这道题,大致就是一个树上的博弈问题.我们一开始读错题意,以…

题目地址: 选题为入门的Codeforce div2/div1的C题和D题. 题解: A:CF思维联系–CodeForces -214C (拓扑排序+思维+贪心) B:CF–思维练习-- CodeForces - 215C - Crosses(思维题) C:CF–思维练习–CodeForces - 216C - Hiring Staff (思维+模拟) D:CF思维联系–CodeForces-217C C. Formurosa(这题鸽了) E:CF思维联系–CodeForces - 218C E…

 Gym 101047M Removing coins in Kem Kadrãn Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Practice Description standard input/output Andréh and his friend Andréas are board-game aficionados. They know many of their friend…

Gym 100935F A Poet Computer Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Description standard input/output The ACM team is working on an AI project called (Eih Eye Three) that allows computers to write poems. One of th…

G. Training Camp[ Color: Yellow ]Montaser is planning to train very hard for ACM JCPC 2015; he has prepared a list with n topicsto study in the next n days, one topic every day.Montaser knows that some topics depend on other topics, so he asked coach…