#include <bits/stdc++.h>
#define  re(i,j,n) for(li i=(j);i<(n);i++)
#define  rep(i,n) re(i,0,(n))
#define  all(a) begin(a),end(a)
#define  pb push_back
using namespace std;
typedef long int li;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<li> vli;
typedef vector<string> vs;


int main()
{
    int l,n,i,sum=0;
    cin>>l>>n;
    int a[n];
    rep(i,n) cin>>a[i];
    sort(a,a+n);
    for(i=0;i<n;i++){
        if(a[i]+sum>l) break; 
        sum+=a[i];
    }
    cout<<i<<endl;
    return 0;
}