L = int(raw_input())
N = int(raw_input())
W = tuple(sorted(map(int, raw_input().split())))

while True:
    tmp = sum(W[0:N])
    if tmp <= L:
        print N
        break
    else:
        if N % 2 == 0:
            N = N / 2
        else:
            N = (N + 1) / 2