#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef string str;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    ll k, n, sum = 0;
    cin >> k >> n;
    ll a[n], countt = 0;
    for (ll i = 0; i < n; i++) cin >> a[i];
    sort(a, a + n);
    for (ll i = 0; i < n; i++)
    {
        sum += a[i];
        countt++;
        if (sum > k)
        {
            countt--;
            sum -= a[i];
            cout << countt;
            return 0;
        }
    }
    cout << countt;
    return 0;
}