#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main(){
    int L, N;
    cin >> L >> N;
    int sum;
    int ans;
    vector<int> v;
    for(int i = 0; i < N; i++){
        int a;
        cin >> a;
        v.push_back(a);
    }
    sort(v.begin(), v.end());
    
    for(int j = 0; j < N; j++){
        sum = v[j] + sum;
        if(sum == L){
            ans = j + 1;
            break;
        }
        if(sum > L){
            ans = j;
            break;
        }
        ans = N;
    }
    cout <<  ans  << endl;
    return 0;
}