def Main():
    l=int(input())
    n=int(input())
    w=list(map(int,input().split()))
    w.sort()
    for i in range(1,n):
        w[i]+=w[i-1]
    ans=0
    for i in range(n):
        if w[i]<=l:
            ans+=1
        else:
            break
    print(ans)
    
Main()