P5020 货币系统

#include<stdio.h>
#include<algorithm>
#include<string.h>
using namespace std;
#define MAXAI 25005
#define MAXN 105
int f[MAXAI];
int a[MAXN];
int main()
{
    //freopen("money.in","r",stdin);
    //freopen("money.out","w",stdout);
    int i,j,n,T,ans;
    scanf("%d",&T);
    while(T--)
    {
        memset(f,0,sizeof(f));
        scanf("%d",&n);ans=n;
        for(i=1;i<=n;i++) scanf("%d",&a[i]);
        sort(a+1,a+n+1);
        f[0]=1;
        for(i=1;i<=n;i++)
        {
            if(f[a[i]])
            {
                ans--;
                continue;
            }
            for(j=a[i];j<=a[n];j++)
            {
                f[j]=f[j]|f[j-a[i]];
            }
        }
        printf("%d\n",ans);
    }
    return 0;
}