#include <bits/stdc++.h>
using namespace std;

int main()
{
    int box, block;
    cin >> box; cin >> block;
    int b[block];
    for(int i = 0; i < block; i++){
        cin >> b[i];
    }
    
    int total = 0;
    int output = 0;
    
    sort(b, b + block);

    while(total <= box){
        total += b[output];
        output += 1;
        if(output > block){
            break;
        }
    }
    
    cout << output-1 << endl;
   
    return 0;
}