import sys
from collections import defaultdict as dfdict
input = sys.stdin.readline

N = int(input())
K = list(map(int, input().split()))
T = [0] * N
A = [[] for _ in [0] * N]
st = set([])
for i in range(N):
	T[i] = int(input())
	A[i] = list(map(int, input().split()))
	st |= set(A[i])
Alis = sorted(st)

ok = 0
ng = len(Alis)

def check():
	st = set([])
	dic = dfdict(int)
	for lis in A:
		s = sum((k >= md) for k in lis)
		st.add(s)
		dic[(s << 1) | (s == len(lis))] += 1
	slis = sorted(st)
	for i, k in enumerate(K[::-1]):
		id0 = (slis[-1] << 1)
		id1 = (id0 | 1)
		if(slis[-1] >= k):
			return True
		elif(i == N - 1):
			return (dic[id1] > 0)
		elif(slis[-1] < k-1 or dic[id0] == 0):
			if(dic[id1] == 0):
				break
			dic[id1] -= 1
		else:
			dic[id0] -= 1
		if(dic[id0] == 0 and dic[id1] == 0):
			slis.pop()
	return False

while(ng - ok > 1):
	mid = (ok + ng) >> 1
	md = Alis[mid]
	if check():
		ok = mid
	else:
		ng = mid

ans = Alis[ok]
print(ans)