import sys

l=int(input())
n=int(input())
w=list(map(int,input().split()))
w.sort()
total=0

if w[0]>l:
    print(0)
    sys.exit()
else:
    for i in range(len(w)):
        if total+w[i] <= l:
            total+=w[i]
        else:
            print(i)
            sys.exit()

print(len(w))