# No.5 数字のブロック
from bisect import bisect_right
from itertools import accumulate


def main():
    L, N = tuple(map(int, [input().rstrip() for _ in range(2)]))
    A = sorted(map(int, input().rstrip().split()))
    ans = bisect_right(tuple(accumulate(A)), L)
    print(ans)


if __name__ == "__main__":
    main()