zojDakar Rally(01背包)

01背包 加上每次更新解题数目最多 总用时最少 因为要保证用时最少,要先把时长由小到大排序。

没排序 WA了几小时。。链接

 1 #include <iostream>
 2 #include<cstdio>
 3 #include<cstring>
 4 #include<algorithm>
 5 #include<stdlib.h>
 6 #include<vector>
 7 #include<cmath>
 8 #include<queue>
 9 #include<set>
10 #include<map>
11 using namespace std;
12 #define N 1010
13 #define LL long long
14 #define INF 0xfffffff
15 const double eps = 1e-8;
16 const double pi = acos(-1.0);
17 const double inf = ~0u>>2;
18 int dp[N*50][5];
19 struct node
20 {
21     int ti,v;
22 }p[N];
23 bool cmp(node x,node y)
24 {
25     return x.ti<y.ti;
26 }
27 int main()
28 {
29     int i,j,t,n,nn;
30     cin>>nn;
31     while(nn--)
32     {
33         memset(dp,0,sizeof(dp));
34         cin>>t>>n;
35         for(i = 1; i <= n; i++)
36         cin>>p[i].ti;
37         for(i = 1; i <= n; i++)
38         cin>>p[i].v;
39         sort(p+1,p+n+1,cmp);
40         for(i = 1 ; i <= n ; i++)
41         {
42             for(j = t ; j >= p[i].ti ; j--)
43             {
44                 if(dp[j-p[i].ti][0]+p[i].v>dp[j][0])
45                 {
46                     dp[j][0] = dp[j-p[i].ti][0]+p[i].v;
47                     dp[j][1] = dp[j-p[i].ti][1]+1;
48                     dp[j][2] = dp[j-p[i].ti][2]+j;
49                 }
50                 else if(dp[j-p[i].ti][0]+p[i].v==dp[j][0]&&dp[j-p[i].ti][1]+1>=dp[j][1])
51                 {
52                     if(dp[j-p[i].ti][1]+1>dp[j][1]||dp[j][2]>dp[j-p[i].ti][2]+j)
53                     {
54                         dp[j][0] = dp[j-p[i].ti][0]+p[i].v;
55                         dp[j][1] = dp[j-p[i].ti][1]+1;
56                         dp[j][2] = dp[j-p[i].ti][2]+j;
57                     }
58                 }
59             }
60         }
61         int ans = 0,x=0,y=0;
62         for(i = t ; i >=0 ;i--)
63         {
64             if(dp[i][0]>=ans)
65             {
66                 if(dp[i][0]==ans&&dp[i][1]>=x)
67                 {
68                     if(dp[i][1]>x||dp[i][2]<y)
69                     {
70                         ans = dp[i][0];
71                         x = dp[i][1];
72                         y = dp[i][2];
73                     }
74                 }
75                 if(dp[i][0]>ans)
76                 {
77                     ans = dp[i][0];
78                     x = dp[i][1];
79                     y = dp[i][2];
80                 }
81             }
82         }
83         cout<<ans<<" "<<x<<" "<<y<<endl;
84     }
85     return 0;
86 }
View Code

 

posted @ 2014-03-15 20:11  _雨  阅读(255)  评论(0编辑  收藏  举报