Cornfields Time Limit:1000MS     Memory Limit:30000KB     64bit IO Format:%I64d & %I64u Submit Status Description FJ has decided to grow his own corn hybrid in order to help the cows make the best possible milk. To that end, he's looking to build the…

Cornfields Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 4911   Accepted: 2392 Description FJ has decided to grow his own corn hybrid in order to help the cows make the best possible milk. To that end, he's looking to build the cornfie…

Cornfields Time Limit: 1000MS   Memory Limit: 30000K Total Submissions:8623   Accepted: 4100 Description FJ has decided to grow his own corn hybrid in order to help the cows make the best possible milk. To that end, he's looking to build the cornfiel…

相比以前的RMQ不同的是,这是一个二维的ST算法 #include<iostream> #include<cstring> #include<cstdio> #include<cmath> using namespace std; #define N 300 ][][N][N]; ][][N][N]; ///int lg[N]; int getmax(int a,int b,int c,int d) { return max(max(a,b),max(c,d…

和hdu2888基本上一样的,也是求一个矩阵内的极值 #include<iostream> #include<cstring> #include<cstdio> #include<algorithm> #include<cmath> using namespace std; #define maxn 252 int n,b,q; ][],dpmin[maxn][maxn][][],val[maxn][maxn]; void ST(){ int k…

题目传送门 Cornfields Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 7963   Accepted: 3822 Description FJ has decided to grow his own corn hybrid in order to help the cows make the best possible milk. To that end, he's looking to build the c…

Check Corners Time Limit: 2000/10000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2513    Accepted Submission(s): 904 Problem Description Paul draw a big m*n matrix A last month, whose entries Ai,j are all intege…

http://acm.hdu.edu.cn/showproblem.php?pid=2888 模板题  直接用二维rmq 读入数据时比较坑爹  cin 会超时 #include <cstdio> #include <cstring> #include <algorithm> using namespace std; ; ][]; void rmq_init(int n, int m) { ; i <= n; i++) { ; j <= m; j++) dp[…

Check Corners Time Limit: 2000/10000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2377    Accepted Submission(s): 859 Problem Description Paul draw a big m*n matrix A last month, whose entries Ai,j are all intege…

<题目链接> <转载于 >>> > 题目大意: 给出一个N*M的矩阵,并且给出该矩阵上每个点对应的值,再进行Q次询问,每次询问给出代询问子矩阵的左上顶点和右下顶点,问该子矩阵的最大值是多少,并且判断该最值是否在该子矩阵的四个顶角上. 解题分析: 很明显求二维区间内的最值,需要用到二维RMQ,其中dp[i][j][k][l]表示左上角为(i,j),右下角为(i + 2 ^ k - 1, j + 2 ^ l - 1)这个矩形内的最值.注意这个四维数组不要开得太大,否则…