from collections import Counter


def main():
    sheets: list[Counter] = [Counter() for _ in range(20)]
    for _ in range(int(input())):

        query_type, *query = input().split()
        match query_type:
            case "0":
                n, _, *neta = query
                sheets[int(n)-1].update(neta)
            case "1":
                for idx, sheet in enumerate(sheets, 1):
                    if sheet[query[0]]:
                        sheet.subtract(query)
                        print(idx)
                        break
                else:
                    print(-1)

            case "2":
                sheets[int(query[0])-1].clear()


if __name__ == "__main__":
    main()