def main():
    L = int(input())
    N = int(input())
    W = map(int, input().split())
    sorted_w = sorted(W)
    ans = 0
    blocks_sum = 0
    for w in sorted_w:
        blocks_sum += w
        if L >= blocks_sum:
            ans += 1
        else:
            exit

    print(ans)

if __name__ == '__main__':
    main()