import sys

def resolve(in_):
    L = int(next(in_))
    N = int(next(in_))
    W = sorted(map(int, next(in_).split()))

    ans = 0
    for w in W:
        L -= w
        if L < 0:
            break
        ans += 1

    return ans


def main():
    ans = resolve(sys.stdin)
    print(ans)


if __name__ == '__main__':
    main()