#include<iostream>
#include<algorithm>
using namespace std;

int main () {
    int L,N,a[11111],i;
    cin >> L >> N;
    for(i = 0;i < N;i++) cin >> a[i];
    sort(a,a + N);
    i = 0;
    int j = 0;
    int sum = 0;
    while(a[i] < L) {
        L -= a[i];
        i++;
        j++;
    }
    cout << j << endl;
    return 0;
}