1 #include<stdio.h>
2 #include<string.h>
3 struct Case{
4 int price,importance;
5 }data[25];
6 int main(){
7 int N,m,T,bag[30000],a,b;
8 scanf("%d",&T);
9 while(T--){memset(bag,0,sizeof(bag));
10 scanf("%d%d",&N,&m);
11 for(int i=0;i<m;++i)scanf("%d%d",&a,&b),data[i].price=a,data[i].importance=a*b;
12 for(int i=0;i<m;++i){
13 for(int j=N;j>0;j--){
14 if(j>=data[i].price){
15 if(bag[j-data[i].price]+data[i].importance>bag[j])bag[j]=bag[j-data[i].price]+data[i].importance; }
16 }
17 }
18 printf("%d\n",bag[N]);
19 }
20 return 0;
21 }
