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def gcd(a, b):
    a = int(a)
    b = int(b)
    while b != 0:
        a, b = int(b), int(a%b)
    return a

src_cnt = [0 for i in range(105)]
reset =  [list((0,0)) for i in range(105)]
v = [[] for i in range(105)]
src = [[] for i in range(105)]

n = int(input())
for i in range(1,n+1):
    conn = list(map(int, input().strip().split()))
    conn.pop(0)
    for a in conn:
        v[i].append(a)
        src[a].append(i)
        src_cnt[a]+=1

for i in range(2,n+1):
    if src_cnt[i] == 0:
        for a in v[i]:
            src_cnt[a]-=1

reset[1] = [len(v[1]), 1]
for i in range(2,n+1):
    if src_cnt[i] > 0:
        reset[i] = [1,0]

for a in v[1]:
    src_cnt[a]-=1

mmax = int(max(1, reset[1][0]))
for i in range(2,n+1):
    if src_cnt[i] == 0 and reset[i][0] > 0:
        nww = 1
        for a in src[i]:
            if reset[a][0] > 0:
                nww = nww // gcd(nww, reset[a][0]) * reset[a][0]
        if len(v[i]) == 0:
            mmax = max(mmax, nww)
            continue
        sum = 0
        for a in src[i]:
            if reset[a][0] > 0:
                sum += nww // reset[a][0] * reset[a][1]
        w = sum // gcd(sum, len(v[i])) * len(v[i])
        reset[i][1] = w // len(v[i])
        reset[i][0] = w // sum * nww
        mmax = max(mmax, reset[i][0])

        for a in v[i]:
            src_cnt[a]-=1

print(int(mmax))