#include<bits/stdc++.h>
using namespace std;

int main(){
    int L,N;
    vector<int> w;
    int in;

    cin >> L >> N;

    while(cin >> in) w.push_back(in);
    sort(w.begin(), w.end());
    int i=0;
    while(L-w[i]>0) L-=w[i++];

    cout << i << endl;

    return 0;
}