随笔分类 - 动态规划—状压dp
摘要:ps:看出是dp了,然而我的状态是这样的:dp[ i ][ j ]( j = 0 表示鱼,j = 1 表示肉,j = 2 表示巧克力 ),发现和 dp[ i - 1][ j ] 和 dp[ i - 2][ j ] 有关,又 n 很大,故明显是矩阵加速递推。问题来了,找不到那个矩阵。。。卒。实际上改变
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摘要:ps:想到了要用矩阵递推,就是没找到式子。dp [ i ][ s ] : 第 i 列状态为 s 的方案数(为了方便用位运算,1表示白色,0表示黑色),剩下的找那个表达矩阵,只要状态 s1 & s2 = 0,则 s1 可以转移到 s2。
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摘要:ps:有写状压的感觉,但还是有些地方没想明白。一定要处理掉那些不合法的状态转移。
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摘要:PS:比赛的时候题都没读懂,dp[ i ][ S ] : 表示第 i 次操作,已经匹配好的点的集合为S的方案数。即该集合和该集合的子集都表示一个匹配,如果这个集合不是一个匹配,那么在dp数组中这个集合的方案数会一直为0,即一直不会被更新。 VJ大佬的代码:201605130100
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摘要:题解:状压dp,dp[ s ][ i ]表示当前已经游玩的点(R中的点),且终点是 i 的最小花费。预处理出任意两点之间的最短距离。总的来说,面向数据编程。 。。。。。。。心里有句mmp。调试了一个小时,始终0%,所有数据怒开long long,然后过了,,,,,
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摘要:Farmer John has purchased a lush new rectangular pasture composed of M by N (1 ≤ M ≤ 12; 1 ≤ N ≤ 12) square parcels. He wants to grow some yummy corn
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摘要:When Kefa came to the restaurant and sat at a table, the waiter immediately brought him the menu. There were n dishes. Kefa knows that he needs exactl
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摘要:You work in a company which organizes marriages. Marriages are not that easy to be made, so, the job is quite hard for you. The job gets more difficul
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摘要:As you know that sometimes base conversion is a painful task. But still there are interesting facts in bases. For convenience let's assume that we are
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摘要:Farmer Johnson's Bulls love playing basketball very much. But none of them would like to play basketball with the other bulls because they believe tha
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摘要:Once upon a time, there was a traveler. He plans to travel using stagecoaches (horse wagons). His starting point and destination are fixed, but he can
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摘要:Mubashwir returned home from the contest and got angry after seeing his room dusty. Who likes to see a dusty room after a brain storming programming c
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摘要:Finally you found the city of Gold. As you are fond of gold, you start collecting them. But there are so much gold that you are getting tired collecti
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摘要:Agent 47 is in a dangerous Mission "Black Monster Defeat - 15". It is a secret mission and so 47 has a limited supply of weapons. As a matter of fact
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