#include <stdio.h>
#include <stdlib.h>

int compare(const void *a, const void *b)
{
        return *(short *)a - *(short *)b;
}

int main(void)
{
        short l,n,*w,i,ans;

        scanf("%hd",&l);
        scanf("%hd",&n);

        w = (short *)malloc(sizeof(short) * n);

        for (i=0;i<n;i++) {
                scanf("%hd",&w[i]);
        }

        qsort(w,n,sizeof(short),compare);

        ans = 0;
        for (i=0;i<n;i++) {
                l -= w[i];
                if (l<0) break;
                ans++;
        }

        printf("%hd\n",ans);

        return 0;
}