Количество различных элементов на отрезке + изменение элемента OFFLINE

Предыстория

Формальная постановка: дан массив $$$a$$$ из $$$n$$$ натуральных чисел. $$$a_i \le 10e9$$$

Rev.	Кто	Когда	Δ	Комментарий
ru37	dushenkov	2024-04-03 14:32:26	2	Мелкая правка: '\n\n<spoiler' -> '\n<spoiler' (опубликовано)
ru36	dushenkov	2024-04-03 14:31:02	4826
ru35	dushenkov	2024-04-03 13:46:10	1
ru34	dushenkov	2024-04-03 13:45:36	1
ru33	dushenkov	2024-04-03 13:42:52	216
ru32	dushenkov	2024-04-03 13:38:55	491
ru31	dushenkov	2024-04-03 13:24:54	243
ru30	dushenkov	2024-04-03 13:21:14	201
ru29	dushenkov	2024-04-03 13:16:28	163
ru28	dushenkov	2024-04-03 13:14:28	85
ru27	dushenkov	2024-04-03 13:12:49	340
ru26	dushenkov	2024-04-03 13:07:03	186
ru25	dushenkov	2024-04-03 13:02:02	915
ru24	dushenkov	2024-04-03 12:43:19	45
ru23	dushenkov	2024-04-03 12:42:27	163
ru22	dushenkov	2024-04-03 12:40:08	53
ru21	dushenkov	2024-04-03 12:37:58	122
ru20	dushenkov	2024-04-03 12:35:04	98
ru19	dushenkov	2024-04-03 12:33:04	270
ru18	dushenkov	2024-04-03 12:26:39	51
ru17	dushenkov	2024-04-03 12:25:23	204
ru16	dushenkov	2024-04-03 12:14:32	320
ru15	dushenkov	2024-04-03 12:08:50	191
ru14	dushenkov	2024-04-03 00:14:07	149
ru13	dushenkov	2024-04-03 00:07:19	62
ru12	dushenkov	2024-04-03 00:05:07	97
ru11	dushenkov	2024-04-03 00:04:22	12
ru10	dushenkov	2024-04-03 00:04:01	5
ru9	dushenkov	2024-04-02 23:59:45	176
ru8	dushenkov	2024-04-02 23:47:20	137
ru7	dushenkov	2024-04-02 23:42:30	44
ru6	dushenkov	2024-04-02 23:39:16	4
ru5	dushenkov	2024-04-02 23:28:36	54
ru4	dushenkov	2024-04-02 23:24:15	180
ru3	dushenkov	2024-04-02 23:19:49	27
ru2	dushenkov	2024-04-02 23:16:38	55
ru1	dushenkov	2024-04-02 23:12:04	283	Первая редакция (сохранено в черновиках)