// No.5 数字のブロック
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
    int L, N;
    cin >> L >> N;
    vector<int> W(N);
    for (int i = 0; i < N; ++i) cin >> W[i];
    sort(W.begin(), W.end());
    vector<int> acc(N + 1);
    for (int i = 0; i < N; ++i) acc[i + 1] = acc[i] + W[i];
    auto iter = prev(upper_bound(acc.begin(), acc.end(), L));
    cout << iter - acc.begin() << endl;
}