n = int(input())
K = list(map(int, input().split()))
A = [[] for _ in range(n)]
for i in range(n):
    input()
    A[i] = list(map(int, input().split()))


def ok(x):
    C = [sum(a >= x for a in row) for row in A]
    C.sort()
    tf = False
    for c, k in zip(C, K):
        if tf:
            c += 1
        tf = c >= k
    return tf


l = 1
r = 1 << 30
while r - l > 1:
    mid = (l + r) // 2
    if ok(mid):
        l = mid
    else:
        r = mid

print(l)