#include<bits/stdc++.h>
#define rep(i,a,n) for (int i = a;i < n;i++)
using namespace std;

int main(){
    int l,n,cnt=0; cin >> l >> n;
    vector<int> w(n);
    rep(i,0,n){
        cin >> w[i];
    }
    sort(w.begin(),w.end());
    rep(i,0,n){
        if(l - w[i] >= 0) {
            l -= w[i];
            cnt++;
        }
    }
    cout << cnt << endl;
}