//注意将价格转化为整数即可
# include <stdio.h>
# include <algorithm>
# include <string.h>
using namespace std;
int max(int a,int b)
{
	return a>b?a:b;
}
int dp[3000050];
int main()
{
	int n,i,j,flag,l,m;
    int suma,sumb,sumc,sum;
	double q,p;
	int cot[35];
	char c;
	while(~scanf("%lf%d",&q,&n),n)
	{	
		l=0;
		sum=int(q*100);
		memset(cot,0,sizeof(cot));
		for(i=0;i<n;i++)
		{
			scanf("%d",&m);
			suma=0;
			sumb=0;
			sumc=0;
			flag=1;		
			for(j=0;j<m;j++)
			{
				scanf(" %c:%lf",&c,&p);
				{
					int p1=int(p*100);
					if(c=='A'&&suma+p1<=60000)
						suma+=p1;
					else if(c=='B'&&sumb+p1<=60000)
						sumb+=p1;
					else if(c=='C'&&sumc+p1<=60000)
						sumc+=p1;
					else
						flag=0;
				}
			}
			if(flag&&suma+sumb+sumc<=100000)
				cot[l++]=suma+sumb+sumc;
		}
		memset(dp,0,sizeof(dp));
		for(i=0;i<l;i++)
		{
			for(j=sum;j>=cot[i];j--)
				dp[j]=max(dp[j],dp[j-cot[i]]+cot[i]);
		}
		printf("%.2lf\n",dp[sum]/100.0);
	}
	return 0;
}

hdu 1864最大报销额 (01背包模板)