[백준/파이썬] 32941번 왜 맘대로 예약하냐고

-Code

t, x = map(int, input().split())
n = int(input())
cnt = 0

for _ in range(n):
    k = int(input())
    a_list = list(map(int, input().split()))

    if x in a_list:
        cnt += 1

print("YES" if cnt == n else "NO")