#!/usr/bin/env python3
from sys import exit

n = int(input())
for _ in range(n):
    input()
l = [0]*n
m = int(input())
for _ in range(m):
    a = input().split()
    if a[0] == 'q':
        if l[int(a[1]) - 1] == 1:
            # Repeated removal
            exit(1)
        l[int(a[1]) - 1] = 1
exit(42)