#fileencoding: utf-8
from __future__ import print_function

def main():
    L = int(raw_input())
    N = int(raw_input())
    W = sorted([int(i) for i in raw_input().split()])
    count = 0
    for i in W:
        L -= i
        if L >= 0:
            count += 1
    print(count)

if __name__ == "__main__":
    main()