HDU 4001 To Miss Our Children Time dp

 1 #include "bits/stdc++.h"
 2 using namespace std;
 3 int n;
 4 struct Block
 5 {
 6     int a, b, c, d;
 7 }block[1010];
 8 bool cmp(Block A, Block B)
 9 {
10     if(A.a != B.a) {
11         return A.a < B.a;
12     }
13     if(A.b != B.b) {
14         return A.b < B.b;
15     }
16     return A.d > B.d;
17 }
18 
19 long long dp[1010];
20 
21 int main()
22 {
23     while(scanf("%d", &n) && n) {
24         memset(dp, 0, sizeof(dp));
25         int i;
26         for(i = 1; i <= n; ++i) {
27             scanf("%d%d%d%d", &block[i].a, &block[i].b, &block[i].c, &block[i].d);
28             if(block[i].a > block[i].b) {
29                 swap(block[i].a, block[i].b);
30             }
31         }
32         sort(block + 1, block + 1 + n, cmp);
33         int j;
34         for(i = 1; i <= n; ++i) {
35             for(j = 0; j < i; ++j) {
36                 if(block[i].d == 0) {
37                     if(block[j].a <= block[i].a && block[j].b <= block[i].b) {
38                         dp[i] = max(dp[i], dp[j] + block[i].c);
39                     }
40                 }
41                 if(block[i].d == 1) {
42                     if((block[j].a <= block[i].a && block[j].b < block[i].b) || (block[j].a < block[i].a && block[j].b <= block[i].b)) {
43                         dp[i] = max(dp[i], dp[j] + block[i].c);
44                     }
45                 }
46                 if(block[i].d == 2) {
47                     if(block[j].a < block[i].a && block[j].b < block[i].b) {
48                         dp[i] = max(dp[i], dp[j] + block[i].c);
49                     }
50                 }
51             }
52         }
53         long long res = 0;
54         for(i = 1; i <= n; ++i) {
55             res = max(res, dp[i]);
56         }
57         printf("%I64d\n", res);
58     }
59 }