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 = []
    all_ = []
    for row in A:
        c = sum(a >= x for a in row)
        if c == len(row):
            all_.append(c)
        else:
            C.append(c)

    if not C:
        return True
    C.sort()
    all_.sort(reverse=True)
    for k in K[::-1]:
        if C and C[-1] >= k:
            return True
        elif all_ and all_[0] >= k:
            return True

        if C[-1] == k - 1:
            if all_ and all_[-1] < k - 1:
                all_.pop()
            else:
                C.pop()
        elif all_:
            all_.pop()
        else:
            return False

        if not C and all_:
            return True

    return False


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

print(l)