def main():
    L = int(input())
    N = int(input())
    block = [int(x) for x in input().split()]
    a=0
    block.sort()
    for i in block:
        L = L - i
        if L >= 0:
            a=a+1

    print(a)





if __name__ == "__main__":
    import time
    start = time.time()
    main()
    print('{} [ms]'.format(1000 * (time.time() - start)))