#include <iostream>
#include <algorithm>
using namespace std;
#define SIZE_OF_ARRAY(array) (sizeof(array) / sizeof(array[0]))

int main(void)
{
    int l, n, c = 0, t = 0;

    cin >> l;
    cin >> n;
    int w[n];
    for (int i = 0; i < n; i++)
        std::cin >> w[i];

    sort(w, w + SIZE_OF_ARRAY(w));
    while (t < l)
    {
        t += w[c];
        c++;
    }
    c--;
    cout << c << endl;
}