#include <stdio.h>

void bubble_sort(int *ary, int total){
    int i,j,tmp;
    for (i=0; i<total; ++i) {
        for (j=i+1; j<total; ++j) {
            if (ary[i] > ary[j]) {
                tmp =  ary[i];
                ary[i] = ary[j];
                ary[j] = tmp;
            }
        }
    }
}


int main(){
    int i,l,n;
    int a[10001];

    int count = 0;

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

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

    bubble_sort(a, n);

    for(i = 0; i < n; ++i){
        if(l >= a[i]){
            count++;
            l -= a[i];
        } else if(l < a[i]){
            break;
        }
    }

    printf("%d\n", count);
    return 0;
}