// No.5 数字のブロック
// https://yukicoder.me/problems/no/5
//
#include <iostream>
#include <vector>
#include <regex>
using namespace std;
int solve(int L, vector<int> &blocks);

int main() {
    int L, N;
    cin >> L >> N;

    vector<int> blocks(static_cast<unsigned long>(N));
    for (auto i = 0; i < N; i++) {
        cin >> blocks[i];
    }

    int ans = solve(L, blocks);
    cout << ans << endl;
}

int solve(int L, vector<int> &blocks) {
    sort(blocks.begin(), blocks.end());
    int ans = 0;

    for (auto b: blocks) {
        L -= b;
        if (L >= 0)
            ans++;
        else
            break;
    }
    return ans;
}