#include <bits/stdc++.h>
#define  Rep(i,j,n) for(li i=(j);i<(n);i++)
#define  rep(i,n) Rep(i,0,(n))
#define  all(a) begin(a),end(a)
using namespace std;
typedef long int li;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<string> vs;
 
int main()
{
    int l,n,ans=0,s=0;
    cin>>l>>n;
    vi w(n);
    rep(i,n)cin>>w[i];
    sort(all(w));
    for(int i:w) {
        s+=i;
        if(s<l)ans++;
        else break;
    }
    cout<<ans<<endl;
    return 0;
}