#include <iostream>
using namespace std;

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];

    for (int i = 1; i < n; i++)
    {
        if (w[i] < w[i - 1])
        {
            int tmp = w[i];
            w[i] = w[i - 1];
            w[i - 1] = tmp;
        }
    }

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