#include<iostream>
#include<vector>
#include<algorithm>
#include<cstdio>
#include<cmath>
#include<string>
using namespace std;
int main(){
    long long L,N,x,i=0,ans=0;
    vector<long long> vc;
    cin >> L >> N;
    while(N--){
        cin >> x;
        vc.push_back(x);
    }
    sort(vc.begin(),vc.end());
    for(i=0;i<vc.size();i++){
        L-=vc[i];
        if(L<0) break; 
        ans++;
    }
    cout << ans;
    return 0;
}