hdu 1244 Max Sum Plus Plus Plus

 1 #include <cstdio>
 2 #include <cstring>
 3 #include <algorithm>
 4 #define maxn 2000
 5 using namespace std;
 6 
 7 int dp[30][maxn];
 8 int a[maxn],b[maxn],sum[maxn];
 9 int n,m;
10 
11 int main()
12 {
13     while(scanf("%d",&n)!=EOF)
14     {
15         if(n==0) break;
16         scanf("%d",&m);
17         memset(a,0,sizeof(a));
18         memset(b,0,sizeof(b));
19         memset(dp,0,sizeof(dp));
20         memset(sum,0,sizeof(sum));
21         for(int i=1; i<=m; i++)
22         {
23             scanf("%d",&a[i]);
24         }
25         for(int i=1; i<=n; i++)
26         {
27             scanf("%d",&b[i]);
28             sum[i]=sum[i-1]+b[i];
29         }
30         int len=0;
31         for(int i=1; i<=m; i++)
32         {
33             len+=a[i];
34             for(int j=len; j<=n; j++)
35             {
36                 dp[i][j]=max(dp[i][j-1],dp[i-1][j-a[i]]+sum[j]-sum[j-a[i]]);
37             }
38         }
39         printf("%d\n",dp[m][n]);
40     }
41     return 0;
42 }