#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < n; ++i)


int main() {
    int l;
    int n;
    cin >> l >> n;
    vector<int> W(n);
    rep(i,n) cin >> W[i];
    sort(W.begin(), W.end());
    int count = 0;
    int sum = 0;
    while(sum < l) {
        sum += W[count];
        count++;
    }
    cout << count-1 << endl;
    return 0;
}