#include <stdio.h>

int main(void)
{
	int l, n, w[10000], a = 0, i, j, t, s = 0;
	scanf("%d%d", &l, &n);
	for (i = 0; i < n; i++) {
		scanf("%d", &w[i]);
		s += w[i];
	}
	for (i = 0; i < n - 1; i++) {
		for (j = n - 1; j > i; j--) {
			if (w[j - 1] > w[j]) {
				t = w[j - 1];
				w[j - 1] = w[j];
				w[j] = t;
			}
		}
	}
	for (i = 0;; i++) if (l < (a += w[i])) break;
	l >= s ? i = n : 0;
	printf("%d", i);
	return 0;
}