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Educational Codeforces Round 190 (Rated for Div. 2)
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Codeforces Edu Round 190 (Div 2) — Solution Discussion

By Shayan

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Contests

#	Contest	Start time	Rank	Solved	Rating change	New rating
92	Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)	May/06/2026 09:05	58	3	+142	2327	Became International Master
91	Codeforces Round 1069 (Div. 1)	Dec/06/2025 11:15	259	3	+34	2185
90	Codeforces Round 1066 (Div. 1 + Div. 2)	Nov/23/2025 12:35	702	5	-23	2151
89	Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2)	Apr/05/2025 17:35	394	5	+53	2174
88	Codeforces Round 1008 (Div. 1)	Mar/10/2025 17:45	306	3	+74	2121	Became Master spike1236 → spike1236
87	Codeforces Round 1007 (Div. 2)	Feb/28/2025 17:35	104	5	+98	2047
86	Educational Codeforces Round 174 (Rated for Div. 2)	Feb/18/2025 17:35	507	4	+13	1949
85	Codeforces Round 1005 (Div. 2)	Feb/16/2025 17:35	422	4	+40	1936	Became Candidate Master spike1236 → spike1236
84	Codeforces Round 1002 (Div. 2)	Feb/02/2025 17:35	1301	3	-29	1896	Became Expert spike1236 → spike1236
83	Codeforces Round 858 (Div. 2)	Mar/18/2023 15:05	229	4	+60	1925	Became Candidate Master spike1236 → spike1236
82	Codeforces Round 857 (Div. 2)	Mar/09/2023 12:35	188	4	+45	1865
81	Codeforces Round 852 (Div. 2)	Feb/12/2023 11:35	585	2	+27	1820
80	CodeCraft-22 and Codeforces Round 795 (Div. 2)	May/31/2022 17:35	1016	3	-10	1793
79	Codeforces Round 791 (Div. 2)	May/14/2022 12:35	360	4	+65	1803
78	Codeforces Round 785 (Div. 2)	Apr/30/2022 17:35	1161	3	-11	1738
77	Codeforces Round 783 (Div. 2)	Apr/19/2022 17:35	219	4	+101	1749
76	Educational Codeforces Round 126 (Rated for Div. 2)	Apr/09/2022 17:35	1248	3	+14	1648
75	Codeforces Round 780 (Div. 3)	Mar/31/2022 17:35	506	5	+40	1634	Became Expert spike1236 → spike1236
74	Codeforces Round 779 (Div. 2)	Mar/27/2022 17:35	3496	2	-77	1594	Became Specialist spike1236 → spike1236
73	CodeTON Round 1 (Div. 1 + Div. 2, Rated, Prizes!)	Mar/24/2022 17:35	1955	3	+25	1671
72	Educational Codeforces Round 125 (Rated for Div. 2)	Mar/22/2022 17:45	793	3	+69	1646	Became Expert spike1236 → spike1236
71	Codeforces Round 778 (Div. 1 + Div. 2, based on Technocup 2022 Final Round)	Mar/20/2022 14:35	4097	2	-96	1577	Became Specialist spike1236 → spike1236
70	Codeforces Round 777 (Div. 2)	Mar/11/2022 17:35	1436	3	0	1673
69	Codeforces Round 768 (Div. 2)	Jan/27/2022 17:35	1195	3	+22	1673
68	Codeforces Round 767 (Div. 2)	Jan/22/2022 17:35	1899	4	-14	1651
67	Codeforces Round 713 (Div. 3)	Apr/10/2021 17:35	114	6	+133	1665	Became Expert spike1236 → spike1236
66	Codeforces Round 710 (Div. 3)	Mar/25/2021 17:35	165	6	+171	1532	Became Specialist spike1236 → spike1236
65	Технокубок 2021 - Финал	Mar/21/2021 13:20	653	1	-59	1361	Became Pupil spike1236 → spike1236
64	Codeforces Round 705 (Div. 2)	Mar/06/2021 17:05	4326	2	-45	1420
63	Codeforces Round 700 (Div. 2)	Feb/07/2021 17:35	3314	2	+2	1465
62	Codeforces Round 692 (Div. 2, based on Technocup 2021 Elimination Round 3)	Dec/20/2020 18:05	9096	1	-166	1463	Became Specialist spike1236 → spike1236
61	Codeforces Round 691 (Div. 2)	Dec/19/2020 12:35	592	3	+64	1629	Became Expert spike1236 → spike1236
60	Technocup 2021 - Elimination Round 1	Oct/25/2020 14:05	376	3	+34	1565
59	Codeforces Round 671 (Div. 2)	Sep/19/2020 17:35	2146	4	+31	1531
58	Codeforces Round 670 (Div. 2)	Sep/12/2020 16:45	1976	3	+69	1500
57	Codeforces Round 668 (Div. 2)	Sep/06/2020 17:35	4515	2	-35	1431
56	Codeforces Round 667 (Div. 3)	Sep/04/2020 17:35	2312	4	+4	1466
55	Educational Codeforces Round 93 (Rated for Div. 2)	Aug/14/2020 17:35	2542	3	+62	1462
54	Codeforces Round 664 (Div. 2)	Aug/12/2020 17:35	2440	3	+81	1400	Became Specialist spike1236 → spike1236
53	Codeforces Round 663 (Div. 2)	Aug/09/2020 17:35	1974	3	+165	1319	Became Pupil spike1236 → spike1236
52	Codeforces Round 662 (Div. 2)	Aug/07/2020 17:35	9940	1	-58	1154	Became Newbie spike1236 → spike1236
51	Codeforces Round 661 (Div. 3)	Aug/05/2020 17:35	2950	3	+99	1212	Became Pupil spike1236 → spike1236
50	Codeforces Round 660 (Div. 2)	Jul/30/2020 17:35	7621	2	+25	1113
49	Codeforces Round 659 (Div. 2)	Jul/24/2020 17:35	6280	0	-94	1088
48	Codeforces Round 658 (Div. 2)	Jul/21/2020 17:35	10156	1	-57	1182	Became Newbie spike1236 → spike1236
47	Codeforces Round 657 (Div. 2)	Jul/19/2020 12:00	4083	1	+78	1239	Became Pupil spike1236 → spike1236
46	Codeforces Round 656 (Div. 3)	Jul/17/2020 17:35	5420	3	+31	1161
45	Codeforces Round 654 (Div. 2)	Jul/01/2020 16:35	7742	2	+18	1130
44	Codeforces Round 653 (Div. 3)	Jun/28/2020 17:35	8943	2	-38	1112
43	Codeforces Round 652 (Div. 2)	Jun/23/2020 17:05	14643	1	-128	1150	Became Newbie spike1236 → spike1236
42	Codeforces Round 651 (Div. 2)	Jun/20/2020 17:35	4632	3	+66	1278
41	Codeforces Global Round 8	Jun/18/2020 17:45	12099	1	-108	1212
40	Codeforces Round 650 (Div. 3)	Jun/16/2020 17:35	6565	2	-44	1320
39	Codeforces Round 649 (Div. 2)	Jun/13/2020 18:05	2835	1	+103	1364
38	Codeforces Round 648 (Div. 2)	Jun/07/2020 17:35	13229	2	-127	1261
37	Codeforces Round 647 (Div. 2) - Thanks, Algo Muse!	Jun/04/2020 17:35	3394	3	+52	1388
36	Codeforces Round 646 (Div. 2)	May/31/2020 17:35	8274	1	-33	1336
35	Codeforces Round 645 (Div. 2)	May/26/2020 17:35	8050	2	-46	1369	Became Pupil spike1236 → spike1236
34	Codeforces Round 643 (Div. 2)	May/16/2020 14:35	4785	2	+19	1415	Became Specialist spike1236 → spike1236
33	Codeforces Round 642 (Div. 3)	May/14/2020 17:35	3511	3	+25	1396
32	Codeforces Round 641 (Div. 2)	May/12/2020 15:35	3905	2	+49	1371
31	Codeforces Round 640 (Div. 4)	May/09/2020 17:35	3598	3	+20	1322
30	Codeforces Round 638 (Div. 2)	May/01/2020 17:35	8088	1	-6	1302
29	Educational Codeforces Round 86 (Rated for Div. 2)	Apr/26/2020 17:35	9455	2	-35	1308
28	Codeforces Round 637 (Div. 2) - Thanks, Ivan Belonogov!	Apr/23/2020 17:45	6374	2	+20	1343
27	Codeforces Round 636 (Div. 3)	Apr/21/2020 17:35	5727	3	+9	1323
26	Codeforces Round 635 (Div. 2)	Apr/15/2020 17:35	6177	2	+23	1314
25	Codeforces Round 634 (Div. 3)	Apr/13/2020 17:35	4315	4	+60	1291
24	Codeforces Round 633 (Div. 2)	Apr/12/2020 17:05	8354	1	-38	1231
23	Codeforces Round 631 (Div. 2) - Thanks, Denis aramis Shitov!	Apr/03/2020 17:35	5943	1	+14	1269
22	Codeforces Round 629 (Div. 3)	Mar/26/2020 17:35	6463	2	+17	1255
21	Educational Codeforces Round 84 (Rated for Div. 2)	Mar/23/2020 17:35	7841	1	+2	1238
20	Codeforces Global Round 7	Mar/19/2020 17:35	6615	2	+13	1236
19	Codeforces Round 628 (Div. 2)	Mar/14/2020 17:35	4360	2	+65	1223	Became Pupil spike1236 → spike1236
18	Codeforces Round 627 (Div. 3)	Mar/12/2020 16:05	5450	2	-21	1158
17	Educational Codeforces Round 83 (Rated for Div. 2)	Mar/09/2020 17:35	4243	2	+60	1179
16	Codeforces Round 626 (Div. 2, based on Moscow Open Olympiad in Informatics)	Mar/07/2020 12:35	3385	1	+36	1119
15	Codeforces Round 624 (Div. 3)	Feb/24/2020 17:35	4337	2	+36	1083
14	Codeforces Round 618 (Div. 2)	Feb/09/2020 17:05	7449	1	-46	1047
13	Codeforces Round 617 (Div. 3)	Feb/04/2020 17:35	7645	1	-35	1093
12	Codeforces Round 616 (Div. 2)	Feb/02/2020 17:05	6059	1	-22	1128
11	Codeforces Round 610 (Div. 2)	Dec/24/2019 17:35	3575	1	+33	1150
10	Codeforces Round 608 (Div. 2)	Dec/15/2019 12:15	4997	0	-112	1117	Became Newbie spike1236 → spike1236
9	Technocup 2020 - Elimination Round 4	Dec/14/2019 14:05	699	1	+16	1229
8	Educational Codeforces Round 77 (Rated for Div. 2)	Nov/27/2019 16:50	3623	2	+6	1213
7	Technocup 2020 - Elimination Round 2	Oct/26/2019 14:05	1151	2	+48	1207	Became Pupil spike1236 → spike1236
6	Codeforces Round 595 (Div. 3)	Oct/22/2019 17:35	4255	2	+8	1159
5	Codeforces Round 590 (Div. 3)	Oct/01/2019 17:35	6553	1	-71	1151	Became Newbie spike1236 → spike1236
4	Codeforces Round 589 (Div. 2)	Sep/29/2019 16:05	4650	1	+17	1222
3	Codeforces Round 588 (Div. 2)	Sep/23/2019 17:05	6114	1	-96	1205
2	Codeforces Round 563 (Div. 2)	Jun/03/2019 17:05	4334	1	-70	1301
1	Codeforces Round 556 (Div. 2)	Apr/29/2019 17:35	4544	0	-129	1371	Became Pupil spike1236 → spike1236

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