hdu 3182 状压dp

 1 #include "bits/stdc++.h"
 2 using namespace std;
 3 int T;
 4
 5 int dp[40000];
 6 int totene[40000];
 7
 8 int N, E;
 9 int val[20], ene[20], cond[20];
10
11 const int INF = 0x3f3f3f3f;
12
13 int main()
14 {
15     scanf("%d", &T);
16     while(T--) {
17         memset(cond, 0, sizeof(cond));
18         memset(dp, 0xf3, sizeof(dp));
19         dp[0] = 0;
20         scanf("%d%d", &N, &E);
21         int res = 0;
22         int i;
23         for(i = 1; i <= N; ++i) {
24             scanf("%d", &val[i]);
25         }
26         for(i = 1; i <= N; ++i) {
27             scanf("%d", &ene[i]);
28         }
29         int M, item;
30         for(i = 1; i <= N; ++i) {
31             scanf("%d", &M);
32             while(M--) {
33                 scanf("%d", &item);
34                 cond[i] |= (1 << (item - 1));
35             }
36         }
37         int tot_s = (1 << N) - 1;
38         int s, step_s, pre_s;
39         for(s = 1; s <= tot_s; ++s) {
40             for(item = 1; item <= N; ++item) {
41
42                 step_s = (1 << (item - 1));
43                 pre_s = s ^ step_s;
44                 if(dp[pre_s] < 0) {
45                     continue;
46                 }
47
48                 if((step_s & s) && ((pre_s & cond[item]) == cond[item])) {
49 //                    if(dp[s] == INF) {
50                     totene[s] = totene[pre_s] + ene[item];
51 //                    }
52                     dp[s] = max(dp[s], dp[pre_s] + val[item]);
53                     if(totene[s] <= E) {
54                         res = max(res, dp[s]);
55                     }
56                     break;
57                 }
58             }
59         }
60         printf("%d\n", res);
61     }
62 }
63
64
65 //4
66 //4 4
67 //1 1 1 1
68 //1 1 1 1
69 //0
70 //1 1
71 //2 1 2
72 //3 1 2 3
73
74 //4
75 //4 4
76 //1 1 1 1
77 //1 1 1 1
78 //1 2
79 //1 1
80 //2 1 2
81 //3 1 2 3