#include <bits/stdc++.h>

using namespace std;

int main() {
	int W; cin >> W;
	int N; cin >> N;
	vector<int> v(N);
	for (int i = 0; i < N; ++i) {
		cin >> v[i];
	}
	sort( v.begin(), v.end() );
	int ans = 0;
	for (int i = 0; i < N; ++i) {
		if (v[i] <= W) {
			W -= v[i];
			++ans;
		}
	}
	cout << ans << endl;
}