南阳49----开心的小明

//01背包
#include<cstdio>
#include<cstring>

int d[30005],val;

void bag(int v,int w)
{
    for(int i=val; i>=v; --i)
        if(d[i] < d[i-v] + w)
            d[i] = d[i-v] + w;
}

int main()
{
    int t,num,v,w;
    scanf("%d",&t);
    while(t--)
    {
        memset(d,0,sizeof d);
        scanf("%d%d",&val,&num);
        while(num--)
        {
            scanf("%d%d",&v,&w);
            bag(v,w*v);
        }
        printf("%d
",d[val]);
    }
    return 0;
}