题目描述  给定一个1*n的地图,在里面玩2048,每次可以合并相邻两个(数值范围1-40),问最大能合出多少.注意合并后的数值并非加倍而是+1,例如2与2合并后的数值为3. 这道题的思路: 状态: f[i][j] 代表当前 i -> j的最大值 . 初始的f[i][i] = a[i]. 然后枚举点 1 -> n-1 到 n 的区间. 然后中间再枚举断点 k. 方程就是 f[i][j] = max(f[k+1][j]+1,f[i][j]); 约束条件: 当且仅当两个区间所得到的最大值相同的时候…

题目描述 Bessie likes downloading games to play on her cell phone, even though she does find the small touch  screen rather cumbersome to use with her large hooves.She is particularly intrigued by the current g ame she is playing. The game starts with a…

传送门 f[i][j]表示区间 i-j 合并的最大值 转移: 若f[i][k] && f[k+1][j] && f[i][k] == f[k+1][j] --> f[i][j] = max(f[i][k]+1,f[i][j]) 但要注意, 若f[i][k]!=f[k+1][j],那么无法进行转移 代码 #include <cstdio> #include <iostream> #define max(x, y) ((x) > (y) ?…

4580: [Usaco2016 Open]248 Time Limit: 10 Sec  Memory Limit: 128 MBSubmit: 255  Solved: 204[Submit][Status][Discuss] Description Bessie likes downloading games to play on her cell phone, even though she does find the small touch  screen rather cumbers…

题目描述 Bessie likes downloading games to play on her cell phone, even though she doesfind the small touch screen rather cumbersome to use with her large hooves. She is particularly intrigued by the current game she is playing.The game starts with a seq…

[USACO16OPEN]248 G 题目: 题目描述 Bessie likes downloading games to play on her cell phone, even though she doesfind the small touch screen rather cumbersome to use with her large hooves. She is particularly intrigued by the current game she is playing.The…

https://www.luogu.org/problemnew/show/P3146 一道区间dp的题,以区间长度为阶段; 但由于要处理相邻的问题,就变得有点麻烦; 最开始想了一个我知道有漏洞的方程 ][j]) f[i][j] = max(f[i][k],f[k + ][j]); ); 可能f[i][k] = f[i][j],但他们可合并的并未相邻; 可以这样 #include <bits/stdc++.h> #define read read() #define up(i,l,r) for…

[USACO16OPEN]248 G 题目描述 Bessie likes downloading games to play on her cell phone, even though she doesfind the small touch screen rather cumbersome to use with her large hooves. She is particularly intrigued by the current game she is playing.The gam…

P3147 [USACO16OPEN]262144 题目描述 Bessie likes downloading games to play on her cell phone, even though she doesfind the small touch screen rather cumbersome to use with her large hooves. She is particularly intrigued by the current game she is playing.…

https://www.luogu.org/problemnew/show/P3147 此题与上一题完全一样,唯一不一样的就是数据范围; 上一题是248,而这一题是262144; 普通的区间dp表示状态表示法根本存不下, 这时我们就要想另外的状态表示法; #include <bits/stdc++.h> #define read read() #define up(i,l,r) for(int i = (l);i <=(r); i++) using namespace std; int…