#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>

using namespace std;

#define rep(i,n) for(int i=0;i<(n);i++)
int main(void){
    // Your code here!
    int l, n, ans = 0; cin >> l >> n;
    vector<int> a(n);
    rep(i, n) cin >> a[i];
    sort(a.begin(), a.end());
    rep(i, n){
        if(l >= a[i]){
            ans += 1;
            l -= a[i];
        }else{
            break;
        }
    }
    cout << ans << endl;
}