POJ1742-Coins

http://poj.org/problem?id=1742

#include<stdio.h>
#include<string.h>
int dp[100010],C[110],A[110],vis[100010];
int main(void)
{
    int n,m,i,j,ans;
    while(scanf("%d%d",&n,&m),n||m)
    {
        for(i=0;i<n;i++) 
           scanf("%d",&A[i]);
        for(i=0;i<n;i++) 
           scanf("%d",&C[i]);
        memset(dp,0,sizeof(dp));
        dp[0]=1;
        ans=0;
        for(i=0;i<n;i++)
        {
            memset(vis,0,sizeof(vis));
            for(j=A[i];j<=m;j++)
               if(!dp[j]&&dp[j-A[i]]&&vis[j-A[i]]<C[i])
               {
                      ans++;
                   dp[j]=1;
                   vis[j]=vis[j-A[i]]+1;
               }
        }
        printf("%d\n",ans);
   }
   return 0;
}