def max_blocks(L, N):
	N.sort()
	
	current_sum= 0
	count= 0
	
	for W in N:
		if current_sum + W <= L:
			current_sum += W
			count += 1
		else:
			break
		
	return count

def main():
	L, N= [int for _ in range(2)]
	W = list(map(int, input().split()))
	result= max_blocks(L, N)
	print(result)
	
if __name__ == "__main__":
    main()