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

int main() {
    int L, N, W[10000], sum = 0, ans = 0;
    cin >> L >> N;
    for(int i=0; i<N; i++) cin >> W[i];
    sort(W, W+N);
    while(sum+W[ans]<L) {
        sum += W[ans];
        ans++;
    }
    cout << ans << endl;
}