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import math

n = int(input())
ado = [[] for _ in range (0, n)]
for i in range(0, n):
	ado[i] = [int(x)-1 for x in input().split()][1:]

if len(ado[0]) == 0:
    print(1)
    quit()

vis_per = [0 for _ in range(0, n)]
vis_cnt = [0 for _ in range(0, n)]
out_per = [0 for _ in range(0, n)]
out_cnt = [0 for _ in range(0, n)]

adi = [[] for _ in range (0, n)]

for i in range(0, n):
    if i > 0 and len(adi[i]) == 0:
        continue
    for j in ado[i]:
        adi[j].append(i)

out_per[0] = len(ado[0])
out_cnt[0] = 1
ans = out_per[0]

for i in range(1, n):
    if len(adi[i]) == 0 or len(ado[i]) == 0:
        continue
    vis_per[i] = 1;
    for j in adi[i]:
        vis_per[i] = math.lcm(vis_per[i], out_per[j])
    for j in adi[i]:
        vis_cnt[i] = vis_cnt[i]+vis_per[i]//out_per[j]*out_cnt[j]
    outdeg = len(ado[i])
    d = math.gcd(vis_cnt[i], outdeg)
    out_per[i] = outdeg//d*vis_per[i]
    out_cnt[i] = vis_cnt[i]//d
    ans = math.lcm(ans, out_per[i])

print(ans)