HDU 1069 最大子序列和（不连续）变形

Monkey and Banana

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 10416    Accepted Submission(s): 5410

Problem Description

A group of researchers are designing an experiment to test the IQ of a monkey. They will hang a banana at the roof of a building, and at the mean time, provide the monkey with some blocks. If the monkey is clever enough, it shall be able to reach the banana by placing one block on the top another to build a tower and climb up to get its favorite food.

The researchers have n types of blocks, and an unlimited supply of blocks of each type. Each type-i block was a rectangular solid with linear dimensions (xi, yi, zi). A block could be reoriented so that any two of its three dimensions determined the dimensions of the base and the other dimension was the height.

They want to make sure that the tallest tower possible by stacking blocks can reach the roof. The problem is that, in building a tower, one block could only be placed on top of another block as long as the two base dimensions of the upper block were both strictly smaller than the corresponding base dimensions of the lower block because there has to be some space for the monkey to step on. This meant, for example, that blocks oriented to have equal-sized bases couldn't be stacked.

Your job is to write a program that determines the height of the tallest tower the monkey can build with a given set of blocks.

 

Input

The input file will contain one or more test cases. The first line of each test case contains an integer n,
representing the number of different blocks in the following data set. The maximum value for n is 30.
Each of the next n lines contains three integers representing the values xi, yi and zi.
Input is terminated by a value of zero (0) for n.

 

Output

For each test case, print one line containing the case number (they are numbered sequentially starting from 1) and the height of the tallest possible tower in the format "Case case: maximum height = height".

 

Sample Input

   
   
   
   

    
    
    
    1
10 20 30
2
6 8 10
5 5 5
7
1 1 1
2 2 2
3 3 3
4 4 4
5 5 5
6 6 6
7 7 7
5
31 41 59
26 53 58
97 93 23
84 62 64
33 83 27
0
   
   
   
   

 

Sample Output

   
   
   
   

    
    
    
    Case 1: maximum height = 40
Case 2: maximum height = 21
Case 3: maximum height = 28
Case 4: maximum height = 342
   
   
   
   

 
题意：是给n种类型的矩形x,y,z   他们可以以任意的姿势的摞在一起，每种都有多个  ，但摞在一起必须满足长和宽都小于下面的才行。求最大高度

#include<bits/stdc++.h>
using namespace std;
struct node
{
    int x,y,z;
}p[10000];
int cmp(node p1,node p2)
{
    if(p1.x<p2.x)
        return 1;
    else if(p1.x==p2.x)
        return p1.y<p2.y;
    else
        return 0;
}
int dp[10000];
int main()
{
    int n,Case=0;
    while(~scanf("%d",&n))
    {Case++;
        if(n==0)
            break;
        int num=0;
        for(int i=0;i<n;i++)
        {
            int x,y,z;
            scanf("%d%d%d",&x,&y,&z);
            p[num].x=x;p[num].y=y;p[num++].z=z;
            p[num].x=y;p[num].y=x;p[num++].z=z;
            p[num].x=z;p[num].y=x;p[num++].z=y;
            p[num].x=x;p[num].y=z;p[num++].z=y;
            p[num].x=y;p[num].y=z;p[num++].z=x;
            p[num].x=z;p[num].y=y;p[num++].z=x;
        }
        sort(p,p+num,cmp);                              //因为是任意的摆放所以要排序
        for(int i=0;i<num;i++)
        dp[i]=p[i].z;
        int Max=0;
        for(int i=1;i<num;i++)
        {
            for(int j=0;j<i;j++)
            {
                if(p[i].x>p[j].x&&p[i].y>p[j].y)
                dp[i]=max(dp[i],dp[j]+p[i].z);
                Max=max(dp[i],Max);
              //cout<<Max;
            }
        }
        printf("Case %d: maximum height = %d\n",Case,Max);
    }
    return 0;
}