UPC 2195 Temple Build（DP）

搞了一下午，枚举顺序要注意....然后数据类型....

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <queue>
 5 #include <map>
 6 #include <ctime>
 7 #include <cmath>
 8 #include <algorithm>
 9 using namespace std;
10 #define LL long long
11 LL dp[1000001];
12 LL c[4];
13 LL h,top,bot,i;
14 LL judge(LL x)
15 {
16     double ans;
17     ans = (bot-top)*x*1.0/h;
18     ans = bot - ans;
19     ans /= c[i];
20     return (int)ans;
21 }
22 int main()
23 {
24     int j;
25     LL ans;
26 
27     while(cin>>h>>bot>>top)
28     {
29         memset(dp,0,sizeof(dp));
30         for(i = 1; i <= 3; i ++)
31         cin>>c[i];
32         for(j = 1; j <= h; j ++)
33         {
34             for(i = 1; i <= 3; i ++)
35             {
36                 int tt;
37                 tt = judge(j);
38                 if(j < c[i]) continue;
39                 if(dp[j] < dp[j-c[i]] + (LL)c[i]*c[i]*c[i]*tt*tt)
40                 {
41                     dp[j] = dp[j-c[i]] + (LL)c[i]*c[i]*c[i]*tt*tt;
42                 }
43             }
44         }
45         ans = 0;
46         for(i = 1; i <= h; i ++)
47         {
48             ans = max(ans,dp[i]);
49         }
50         cout<<ans<<endl;
51     }
52     return 0;
53 }

 

posted @ 2013-05-22 17:17  Naix_x  阅读(159)  评论(0)  编辑  收藏  举报