hdu 2191 悼念512汶川大地震遇难同胞——珍惜现在，感恩生活

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=2191

#include<stdio.h>
#include<string.h>
#include<iostream>
using namespace std;
int dp[102],W;
int p[102],w[102],num[102];
void pack(int cost,int weight)
{
       for(int i=W;i>=weight;i--)
              dp[i]=max(dp[i],dp[i-weight]+cost);
}
void ComletePack(int cost,int weight)
{
       for(int i=weight;i<=W;i++)
              dp[i]=max(dp[i],dp[i-weight]+cost);
}
void MultiPack(int weight ,int cost,int num)
{
       if(num*cost>=W)
              ComletePack(weight,cost);
       else
       {
       int k=1;
       while(k<num){
              pack(weight*k,cost*k);
                     num-=k;k+=k;
       }
       pack(weight*num,cost*num);
       }
}
int main(){
       int T,n,i;
       scanf("%d",&T);
       while(T--)
       {
              scanf("%d%d",&W,&n);
              for(i=0;i<n;i++)
                     scanf("%d%d%d",&p[i],&w[i],&num[i]);
              memset(dp,0,sizeof(dp));
              for(i=0;i<n;i++)
                     MultiPack(w[i],p[i],num[i]);
              printf("%d\n",dp[W]);
       }
       return 0;
}