import sys

def check_range(a,b,x):
	if a > x or b < x:
		sys.exit()

def check_eq(a,b):
	if a != b:
		sys.exit()

L = int(input())
check_range(1,10000,L)

N = int(input())
check_range(1,10000,N)

data = input().split(' ')
check_eq(len(data),N)

for i in range(0,N):
	data[i] = int(data[i])
	check_range(1,L,N)

size = 0
cnt = 0
data = sorted(data)

for i in range(0,N):
	if data[i] + size <= L:
		cnt += 1
		size += data[i]		
	else:
		break

print(cnt)