【BZOJ1270】1270: [BeijingWc2008]雷涛的小猫 DP

Description

 

Input

Output

Sample Input

Sample Output

8

HINT

Source

唉这么蠢的Dp没一下子看出来，Dp真是太弱了啦。

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <cmath>
 5 using namespace std;
 6 int f1[5050],eat[5050][5050],f2[5050];
 7 int n,h,d;
 8 int read()
 9 {
10     int ans=0;char c;
11     while ((c=getchar())==' ' || c=='\n' || c=='\r');
12     ans=c-'0';
13     while (isdigit(c=getchar()))    ans=ans*10+c-'0';
14     return ans;
15 }
16 
17 int main()
18 {
19     n=read();h=read();d=read();
20     for (int i=1;i<=n;i++)
21     {
22         int x;
23         x=read();
24         for (int j=1;j<=x;j++)
25         {
26             int a;
27             a=read();
28             eat[i][a]++;
29         }
30     }
31     for (int i=h;i>=1;i--)
32     {
33         int t=i+d<=h?f1[i+d]:0;
34         for (int j=1;j<=n;j++)
35         {
36             f2[j]=max(f2[j],t)+eat[j][i];
37             f1[i]=max(f1[i],f2[j]);
38         }
39     }
40     printf("%d\n",f1[1]);
41     return 0;
42 }

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