from collections import defaultdict
n = int(input())
ans = []
li = [[0] * 21 for _ in range(100)]
sushi = {}
scnt = 0
kyaku = defaultdict(set)
for i in range(n):
    u = input().split()
    if u[0] == "0":
        m = defaultdict(int)
        a, b = map(int, u[1:3])
        for s in u[3:]:
            if s not in sushi:
                sushi[s] = scnt
                scnt += 1
            m[s] += 1
        for k, v in m.items():
            li[sushi[k]][a] = v
            li[sushi[k]][0] += v
            kyaku[a].add(k)
    elif u[0] == "1":
        s = u[1]
        if s in sushi and li[sushi[s]][0]:
            for j in range(1, 21):
                if li[sushi[s]][j]:
                    ans.append(j)
                    li[sushi[s]][j] -= 1
                    li[sushi[s]][0] -= 1
                    break
        else:
            ans.append(-1)
    else:
        a = int(u[1])
        for b in kyaku[a]:
            li[sushi[b]][0] -= li[sushi[b]][a]
            li[sushi[b]][a] = 0
        del kyaku[a]
print(*(a for a in ans), sep="\n")