题意: 给出n*m的矩阵求最大子矩阵和,要求必须把矩阵中的某一个元素替换成p 代码: //求最大子矩阵和,容易想到压缩之后dp但是这道题要求必须替换一次p,必然优先替换最小的. //这样如果求得的结果恰好等于这个矩阵所有的元素的 //和但不是整个矩阵,并且没有替换元素结果就不对了,需要特判一下这种情况.比如以下两组数据: //2 2 -4 2 2 -4 //1 -1 1 1 //1 1 1 1 dp求出来的结果分别是2和4并且没有替换p. #include<iostream> #include…

#1580 : Matrix 时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 Once upon a time, there was a little dog YK. One day, he went to an antique shop and was impressed by a beautiful picture. YK loved it very much. However, YK did not have money to buy it. He begged…

To The Max Problem's Link: http://acm.hdu.edu.cn/showproblem.php?pid=1081 Mean: 求N*N数字矩阵的最大子矩阵和. analyse: 乍看题目意思很简单,但对于刚开始学DP的新手来说也不是很简单. 这道题使用到的算法是:预处理+最大连续子串和 如果会做最大连续子串和,那么理解这题就相对简单一些,若不知道最大连续子串和,建议先看一下这两题: http://acm.hdu.edu.cn/showproblem.php?pi…

To the Max Time Limit: 2 Seconds      Memory Limit: 65536 KB Problem Given a two-dimensional array of positive and negative integers, a sub-rectangle is any contiguous sub-array of size 1 x 1 or greater located within the whole array. The sum of a re…

Largest Rectangle in a Histogram Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 11541    Accepted Submission(s): 3174 Problem Description A histogram is a polygon composed of a sequence of rect…

HDU 模拟题, 枚举1002 1004 1013 1015 1017 1020 1022 1029 1031 1033 1034 1035 1036 1037 1039 1042 1047 1048 1049 1050 1057 1062 1063 1064 1070 1073 1075 1082 1083 1084 1088 1106 1107 1113 1117 1119 1128 1129 1144 1148 1157 1161 1170 1172 1177 1197 1200 1201…

转载来自:http://www.cppblog.com/acronix/archive/2010/09/24/127536.aspx 分类一: 基础题:1000.1001.1004.1005.1008.1012.1013.1014.1017.1019.1021.1028.1029.1032.1037.1040.1048.1056.1058.1061.1070.1076.1089.1090.1091.1092.1093.1094.1095.1096.1097.1098.1106.1108.1157…

模拟题, 枚举 1002 1004 1013 1015 1017 1020 1022 1029 1031 1033 1034 1035 1036 1037 1039 1042 1047 1048 1049 1050 1057 1062 1063 1064 1070 1073 1075 1082 1083 1084 1088 1106 1107 1113 1117 1119 1128 1129 1144 1148 1157 1161 1170 1172 1177 1197 1200 1201 12…

模拟题, 枚举1002 1004 1013 1015 1017 1020 1022 1029 1031 1033 1034 1035 1036 1037 1039 1042 1047 1048 1049 1050 1057 1062 1063 1064 1070 1073 1075 1082 1083 1084 1088 1106 1107 1113 1117 1119 1128 1129 1144 1148 1157 1161 1170 1172 1177 1197 1200 1201 120…

http://blog.csdn.net/lyy289065406/article/details/6642573 模拟题, 枚举1002 1004 1013 1015 1017 1020 1022 1029 1031 1033 1034 1035 1036 1037 1039 1042 1047 1048 1049 1050 1057 1062 1063 1064 1070 1073 1075 1082 1083 1084 1088 1106 1107 1113 1117 1119 1128…