1 #include<cstdio> 2 #include<cstring> 3 using namespace std; 4 int f[25][15010]; 5 int c[25],g[25]; 6 int C,G; 7 int main() 8 { 9     scanf("%d%d",&C,&G);10     for (int i=1;i<=C;i++) scanf("%d",&c[i]);11     for (int i=1;i<=G;i++) scanf("%d",&g[i]);12     memset(f,0,sizeof(f));13     f[0][7500]=1;14     for (int i=1;i<=G;i++)15         for (int j=-7500;j<=7500;j++)16             if (f[i-1][j+7500]>0)17             {18                 for (int k=1;k<=C;k++)19                     f[i][j+c[k]*g[i]+7500]+=f[i-1][j+7500];20             }21     printf("%d\n",f[G][7500]);22     return 0;23 }