//debug
#define _GLIBCXX_DEBUG
//include
#include <bits/stdc++.h>
//using
using namespace std;
using ll = long long;
//define
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define inf 1e9
//function
void solve()
{
    int l;
    cin >> l;
    int n;
    cin >> n;
    vector<int> w(n);
    rep(i, n) cin >> w[i];
    sort(all(w));
    int ans = 0;
    rep(i, n)
    {
        l -= w[i];
        if (l >= 0)
            ans++;
        if (l <= 0)
            break;
    }
    cout << ans << endl;
    return;
}
//main
int main()
{
    solve();
    return 0;
}