#include<map>
#include<set>
#include<list>
#include<cmath>
#include<queue>
#include<stack>
#include<cstdio>
#include<string>
#include<vector>
#include<complex>
#include<cstdlib>
#include<cstring>
#include<climits>
#include<numeric>
#include<sstream>
#include<iostream>
#include<algorithm>
#include<functional>

#define MP make_pair
#define PB push_back
#define ALL(x) (x).begin(),(x).end()
#define REP(i,n) for(int i=0;i<(n);i++)
#define REP1(i,n) for(int i=1;i<(n);i++)
#define REP2(i,d,n) for(int i=(d);i<(n);i++)
#define RREP(i,n) for(int i=(n);i>=0;i--)

using namespace std;

int main(){
    int l,n,x,cnt=0,ans=0;
    cin >> l >> n;
    vector<int> v;
    REP(i,n){
        cin >> x;
        v.push_back(x);
    }
    sort(ALL(v));
    REP(i,n){
        if(cnt+v[i]>l){
            break;
        }
        cnt += v[i];
        ans++;
    }
    cout << ans << endl;
    return 0;
}