# import sys
from collections import deque, defaultdict
from copy import deepcopy
from bisect import bisect_left, bisect_right, insort_left, insort_right
from heapq import heapify, heappop, heappush
from itertools import product, permutations, combinations, combinations_with_replacement
from functools import reduce
from math import gcd, sin, cos, tan, asin, acos, atan, degrees, radians, ceil, floor, log, sqrt
from math import pi as PI
from decimal import Decimal
# sys.setrecursionlimit(10**6)
INF = 10**18
MOD = 10**9+7
# MOD = 998244353
yes="Yes"
no="No"
from math import ceil
def II():return int(input())
def SI():return str(input())
def MI():return map(int,input().split())
def MS():return map(str,input().split())
def LI():return list(map(int,input().split()))
def LS():return list(map(str,input().split()))
l=II()
n=II()
w=sorted(LI())
cnt=0
for i in range(n):
    if l-w[i]>=0:
        l-=w[i]
        cnt+=1
    else:
        print(cnt)
        exit()