import sys
def input():
    return sys.stdin.readline()[:-1]



"""

list(map(int,input().split()))

"""


def Main():
    l=int(input())
    n=int(input())
    w=sorted(map(int,input().split()))

    ans=0
    for i in range(n):
        if w[i]<=l:
            ans+=1
            l-=w[i]
        else:
            break
    print(ans)
    
Main()