#include <iostream>

using namespace std;

void swap(int *w, int i) {
    int tmp = w[i];
    w[i] = w[i-1];
    w[i-1] = tmp;
}

void bubblesort(int *w, int n) {
    for (int i = 0; i < n-1; i++) {
        for (int j = n-1; j > i; j--) {
            if (w[j] < w[j-1]) {
                swap(w, j);
            }
        }
    }
}

int main() {
    int l, n, cnt;
    int w[10000];

    cin >> l;
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> w[i];
    }

    bubblesort(w, n);

    cnt = 0;
    for (int i = 0; i < n; i++) {
        l = l - w[i];
        if (l < 0) {
            break;
        }
        cnt++;
    }

    cout << cnt << endl;

    return 0;
}