#include <bits/stdc++.h>

using namespace std;

char buf[100000];

void gets(int *a, int n) {
	fgets(buf, sizeof(buf), stdin);

	char *b = buf;
	for (int i = 0; i < n; i++) {
		if (1 != sscanf(b, "%d", a + i)) break;
		while (*b != '\0' && !isspace(*b)) b++;
		while (*b != '\0' && isspace(*b))	b++;
	}
}

int W[10000];

int main(int argc, char **argv) {
	int L, N;
	fgets(buf, sizeof(buf), stdin);
	sscanf(buf, "%d", &L);
	fgets(buf, sizeof(buf), stdin);
	sscanf(buf, "%d", &N);

	gets(W, N);

	sort(W, W + N);

	int i;
	for (i = 0; i < N; i++) {
		if (L - W[i] < 0) {
			break;
		}
		L -= W[i];
	}
	printf("%d\n", i);
	return 0;
}