题目链接:https://www.luogu.org/problemnew/show/P1825 带有传送门的迷宫问题 #include <cstdio> #include <cstring> #include <iostream> #include <algorithm> using namespace std; const int maxn = 2001; char map[maxn][maxn]; int fx[4] = {0, 1, 0, -1};…

P1825 [USACO11OPEN]玉米田迷宫Corn Maze 题目描述 This past fall, Farmer John took the cows to visit a corn maze. But this wasn't just any corn maze: it featured several gravity-powered teleporter slides, which cause cows to teleport instantly from one point in…

P1825 [USACO11OPEN]玉米田迷宫Corn Maze 题目描述 This past fall, Farmer John took the cows to visit a corn maze. But this wasn't just any corn maze: it featured several gravity-powered teleporter slides, which cause cows to teleport instantly from one point in…

https://www.luogu.org/problem/show?pid=1825 题目描述 This past fall, Farmer John took the cows to visit a corn maze. But this wasn't just any corn maze: it featured several gravity-powered teleporter slides, which cause cows to teleport instantly from on…

题目描述 This past fall, Farmer John took the cows to visit a corn maze. But this wasn't just any corn maze: it featured several gravity-powered teleporter slides, which cause cows to teleport instantly from one point in the maze to another. The slides w…

题目描述 This past fall, Farmer John took the cows to visit a corn maze. But this wasn't just any corn maze: it featured several gravity-powered teleporter slides, which cause cows to teleport instantly from one point in the maze to another. The slides w…

P1825 传送门 简单的题意 就是一个有传送门的迷宫问题(我一开始以为是只有1个传送门,然后我就凉了). 大体思路 先把传送门先存起来,然后跑一下\(BFS\). 然后,就做完了. 代码鸭 #include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #include <iomanip> #include…

题目链接:https://www.luogu.org/problemnew/show/P1879 状压DP. 设dp[i][j]表示第i行,状态为j的方案数 初始dp[0][0] = 1 这样一共12行12列,最多1<<12. 这样转移时,只要满足上下没有两个1,这两行分别满足没有相邻1. 加法原理转移. \(j&k==0\) $ dp[i][j] += dp[i-1][k] $ #include <cstdio> #include <cstring> #inc…

题目描述 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 for the cows on a number of squares. Regrettably, some of the squares are infertile and can't b…

题目链接 数据范围这么小,难度又这么大,一般就是状态压缩DP了. 对输入进行处理,二进制表示每一行的草地状况.如111表示这一行草地肥沃,压缩成7. 所以f[i][j]表示第i行状态为j时的方案数 状态j指的是一个二进制集合,有牛在吃草的位置是1,不再吃草的位置是0 f[i][j]=Sum(f[i-1][k]) 限制:(1) j必须是草地状况的子集.很好理解,如果有牛在贫瘠草地上吃草……会被投诉到动物保护协会的 (2) j 的相邻两个位置不能都是1. 代码表示为!(j&(j<<1) (…