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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
174	Hello 2024	Jan/06/2024 17:35	2491	3	+95	1493	Became Specialist sofiaasta → sofiaasta
173	Pinely Round 2 (Div. 1 + Div. 2)	Aug/30/2023 17:35	3336	4	+45	1398
172	Codeforces Round 888 (Div. 3)	Jul/25/2023 17:35	5190	3	-30	1353
171	Codeforces Round 875 (Div. 2)	May/28/2023 17:35	3372	2	+4	1383
170	Codeforces Round 869 (Div. 2)	Apr/29/2023 17:35	3601	2	-60	1379	Became Pupil sofiaasta → sofiaasta
169	Codeforces Round 865 (Div. 2)	Apr/09/2023 17:45	553	3	+164	1439	Became Specialist sofiaasta → sofiaasta
168	Codeforces Round 862 (Div. 2)	Apr/02/2023 17:35	7038	2	-70	1275
167	CodeTON Round 4 (Div. 1 + Div. 2, Rated, Prizes!)	Mar/31/2023 17:35	4828	3	-14	1345
166	Codeforces Round 860 (Div. 2)	Mar/26/2023 17:35	6767	2	-77	1359	Became Pupil sofiaasta → sofiaasta
165	Nebius Welcome Round (Div. 1 + Div. 2)	Mar/12/2023 17:35	2908	3	+18	1436
164	Codeforces Round 856 (Div. 2)	Mar/04/2023 20:35	1716	3	+26	1418	Became Specialist sofiaasta → sofiaasta
163	Codeforces Round 853 (Div. 2)	Feb/25/2023 17:20	6769	1	-114	1392	Became Pupil sofiaasta → sofiaasta
162	Codeforces Round 848 (Div. 2)	Feb/01/2023 17:35	3250	2	-27	1506
161	Educational Codeforces Round 142 (Rated for Div. 2)	Jan/24/2023 17:35	2251	3	+1	1533
160	Educational Codeforces Round 141 (Rated for Div. 2)	Jan/08/2023 17:35	1459	3	+63	1532
159	Codeforces Round 842 (Div. 2)	Jan/05/2023 17:35	2481	3	+30	1469
158	Hello 2023	Jan/03/2023 17:35	5445	2	-28	1439
157	Good Bye 2022: 2023 is NEAR	Dec/30/2022 17:35	4312	2	+15	1467
156	Codeforces Round 841 (Div. 2) and Divide by Zero 2022	Dec/27/2022 17:35	3595	2	-22	1452
155	Polynomial Round 2022 (Div. 1 + Div. 2, Rated, Prizes!)	Dec/17/2022 17:35	2297	3	+45	1474
154	Educational Codeforces Round 140 (Rated for Div. 2)	Dec/16/2022 17:35	4215	2	-28	1429
153	Codeforces Round 837 (Div. 2)	Dec/11/2022 18:35	3710	1	-45	1457
152	CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!)	Nov/06/2022 17:35	2781	3	0	1502
151	Codeforces Round 832 (Div. 2)	Nov/04/2022 17:35	1377	3	+66	1502
150	CodeTON Round 2 (Div. 1 + Div. 2, Rated, Prizes!)	Jul/31/2022 17:05	5156	3	-57	1436
149	Codeforces Round 810 (Div. 2)	Jul/24/2022 17:35	1709	3	+46	1493
148	Codeforces Global Round 21	Jun/25/2022 17:35	2522	3	+61	1447	Became Specialist sofiaasta → sofiaasta
147	Codeforces Round 789 (Div. 2)	May/08/2022 17:35	3319	2	-22	1386	Became Pupil sofiaasta → sofiaasta
146	Codeforces Round 785 (Div. 2)	Apr/30/2022 17:35	2826	2	0	1408
145	Educational Codeforces Round 127 (Rated for Div. 2)	Apr/22/2022 17:35	3565	3	-26	1408
144	Codeforces Round 782 (Div. 2)	Apr/17/2022 17:35	1939	3	+41	1434	Became Specialist sofiaasta → sofiaasta
143	Codeforces Round 779 (Div. 2)	Mar/27/2022 17:35	3721	2	-24	1393	Became Pupil sofiaasta → sofiaasta
142	Codeforces Round 773 (Div. 2)	Feb/23/2022 13:10	4819	2	-83	1417
141	Codeforces Round 772 (Div. 2)	Feb/20/2022 17:35	3036	3	-25	1500
140	Codeforces Round 771 (Div. 2)	Feb/14/2022 17:35	2267	3	+16	1525
139	Codeforces Global Round 19	Feb/12/2022 17:35	2600	3	+40	1509
138	Codeforces Round 770 (Div. 2)	Feb/06/2022 17:35	2312	3	+43	1469
137	Codeforces Round 752 (Div. 2)	Oct/30/2021 17:35	3137	3	-19	1426
136	Codeforces Round 749 (Div. 1 + Div. 2, based on Technocup 2022 Elimination Round 1)	Oct/17/2021 14:05	2678	2	+10	1445
135	Codeforces Round 747 (Div. 2)	Oct/08/2021 18:05	3323	4	-32	1435
134	Codeforces Round 746 (Div. 2)	Oct/03/2021 17:35	1369	2	+85	1467	Became Specialist sofiaasta → sofiaasta
133	Educational Codeforces Round 114 (Rated for Div. 2)	Sep/20/2021 17:35	2637	3	+43	1382
132	Codeforces Global Round 16	Sep/12/2021 17:35	7520	3	-97	1339	Became Pupil sofiaasta → sofiaasta
131	Educational Codeforces Round 113 (Rated for Div. 2)	Sep/08/2021 17:35	3183	2	+2	1436
130	Deltix Round, Summer 2021 (open for everyone, rated, Div. 1 + Div. 2)	Aug/29/2021 17:35	3858	2	-8	1434
129	Codeforces Round 739 (Div. 3)	Aug/18/2021 17:35	3451	4	-35	1442
128	Codeforces Round 738 (Div. 2)	Aug/15/2021 17:35	4433	3	-38	1477
127	Codeforces Global Round 15	Jul/25/2021 17:35	5167	1	-80	1515
126	Codeforces Round 734 (Div. 3)	Jul/23/2021 17:35	455	5	+73	1595
125	Harbour.Space Scholarship Contest 2021-2022 (open for everyone, rated, Div. 1 + Div. 2)	Jul/22/2021 17:35	2043	4	+67	1522
124	Codeforces Round 733 (Div. 1 + Div. 2, based on VK Cup 2021 - Elimination (Engine))	Jul/17/2021 17:35	4246	3	-24	1455
123	Codeforces Round 732 (Div. 2)	Jul/11/2021 17:05	2865	2	-6	1479
122	Codeforces Global Round 14	May/02/2021 17:35	2750	4	+48	1485
121	Educational Codeforces Round 108 (Rated for Div. 2)	Apr/29/2021 17:35	6943	2	-90	1437
120	Contest 2050 and Codeforces Round 718 (Div. 1 + Div. 2)	Apr/23/2021 17:35	1743	4	+98	1527
119	Educational Codeforces Round 107 (Rated for Div. 2)	Apr/12/2021 17:35	3854	3	-25	1429
118	Divide by Zero 2021 and Codeforces Round 714 (Div. 2)	Apr/11/2021 17:35	4138	1	-60	1454
117	Codeforces Round 712 (Div. 2)	Apr/03/2021 17:35	2326	2	-8	1514
116	CodeCraft-21 and Codeforces Round 711 (Div. 2)	Mar/29/2021 17:35	3550	2	-56	1522
115	Codeforces Round 709 (Div. 2, based on Technocup 2021 Final Round)	Mar/21/2021 16:20	2040	2	-38	1578	Became Specialist sofiaasta → sofiaasta
114	Educational Codeforces Round 106 (Rated for Div. 2)	Mar/18/2021 17:50	1477	3	+20	1616	Became Expert sofiaasta → sofiaasta
113	Codeforces Round 705 (Div. 2)	Mar/06/2021 17:05	1709	2	+16	1596
112	Educational Codeforces Round 105 (Rated for Div. 2)	Mar/02/2021 17:45	1646	2	+43	1580
111	Codeforces Global Round 13	Feb/28/2021 16:35	2523	3	+49	1537
110	Codeforces Round 704 (Div. 2)	Feb/23/2021 12:05	2228	3	+22	1488
109	Codeforces Round 703 (Div. 2)	Feb/18/2021 17:35	3067	2	+24	1466
108	Codeforces Round 702 (Div. 3)	Feb/16/2021 17:35	1773	5	+15	1442
107	Educational Codeforces Round 104 (Rated for Div. 2)	Feb/15/2021 17:35	6778	2	-82	1427
106	Codeforces Round 700 (Div. 2)	Feb/07/2021 17:35	3264	2	-12	1509
105	Codeforces Round 699 (Div. 2)	Feb/05/2021 17:35	2321	3	+31	1521
104	Educational Codeforces Round 103 (Rated for Div. 2)	Jan/29/2021 17:35	2058	3	+69	1490
103	Codeforces Round 698 (Div. 2)	Jan/28/2021 17:35	5141	2	-37	1421
102	Educational Codeforces Round 102 (Rated for Div. 2)	Jan/14/2021 17:35	7243	2	-96	1458
101	Codeforces Round 695 (Div. 2)	Jan/08/2021 17:35	2090	2	+41	1554
100	Codeforces Round 694 (Div. 2)	Jan/05/2021 17:35	2086	3	+37	1513
99	Codeforces Round 693 (Div. 3)	Jan/04/2021 17:35	2295	4	-7	1476
98	Good Bye 2020	Dec/30/2020 17:35	3838	4	+25	1483
97	Educational Codeforces Round 101 (Rated for Div. 2)	Dec/28/2020 17:35	2801	2	+27	1458
96	Codeforces Round 691 (Div. 2)	Dec/19/2020 12:35	3754	1	-66	1431
95	Educational Codeforces Round 100 (Rated for Div. 2)	Dec/17/2020 17:35	3249	2	-8	1497
94	Codeforces Round 690 (Div. 3)	Dec/15/2020 17:35	1150	5	+22	1505
93	Codeforces Round 689 (Div. 2, based on Zed Code Competition)	Dec/11/2020 17:35	2608	3	-7	1483
92	Codeforces Round 688 (Div. 2)	Dec/04/2020 16:05	3598	2	-41	1490
91	Educational Codeforces Round 99 (Rated for Div. 2)	Nov/30/2020 17:35	1149	4	+99	1531
90	Codeforces Round 687 (Div. 2, based on Technocup 2021 Elimination Round 2)	Nov/29/2020 10:05	3013	2	-62	1432
89	Codeforces Round 685 (Div. 2)	Nov/21/2020 17:35	2179	3	+43	1494
88	Codeforces Round 684 (Div. 2)	Nov/17/2020 17:35	3234	2	-34	1451
87	Codeforces Round 683 (Div. 2, by Meet IT)	Nov/15/2020 17:35	1468	3	+15	1485
86	Codeforces Round 681 (Div. 2, based on VK Cup 2019-2020 - Final)	Nov/02/2020 17:35	2006	3	+3	1470
85	Codeforces Round 680 (Div. 2, based on Moscow Team Olympiad)	Nov/01/2020 14:05	1513	3	+32	1467
84	Educational Codeforces Round 97 (Rated for Div. 2)	Oct/27/2020 17:35	2900	2	+11	1435
83	Codeforces Round 679 (Div. 2, based on Technocup 2021 Elimination Round 1)	Oct/25/2020 14:05	2950	2	-52	1424
82	Codeforces Round 678 (Div. 2)	Oct/24/2020 17:05	2510	2	+11	1476
81	Codeforces Round 677 (Div. 3)	Oct/20/2020 17:35	4342	4	-72	1465
80	Codeforces Round 676 (Div. 2)	Oct/18/2020 12:05	1836	3	+23	1537
79	Codeforces Raif Round 1 (Div. 1 + Div. 2)	Oct/17/2020 16:05	3320	3	-3	1514
78	Educational Codeforces Round 96 (Rated for Div. 2)	Oct/11/2020 12:05	996	4	+97	1517
77	Codeforces Global Round 11	Oct/10/2020 17:50	3745	2	+2	1420
76	Codeforces Round 675 (Div. 2)	Oct/04/2020 19:05	3115	2	-12	1418
75	Grakn Forces 2020	Sep/30/2020 17:35	4549	2	-51	1430
74	Codeforces Round 673 (Div. 2)	Sep/27/2020 18:05	1392	3	+42	1481
73	Codeforces Round 672 (Div. 2)	Sep/24/2020 17:35	4511	3	-23	1439
72	Codeforces Round 671 (Div. 2)	Sep/19/2020 17:35	2648	4	+29	1462
71	Codeforces Round 670 (Div. 2)	Sep/12/2020 16:45	3479	2	+13	1433
70	Codeforces Round 669 (Div. 2)	Sep/08/2020 17:35	2671	2	+67	1420	Became Specialist sofiaasta → sofiaasta
69	Codeforces Round 668 (Div. 2)	Sep/06/2020 17:35	2127	3	+96	1353
68	Codeforces Round 667 (Div. 3)	Sep/04/2020 17:35	5095	3	-1	1257
67	Codeforces Round 666 (Div. 2)	Aug/30/2020 17:35	6334	1	-23	1258
66	Educational Codeforces Round 94 (Rated for Div. 2)	Aug/25/2020 17:35	8822	1	-63	1281
65	Codeforces Round 665 (Div. 2)	Aug/21/2020 17:35	4788	3	+9	1344
64	Codeforces Global Round 10	Aug/16/2020 17:35	5898	3	-30	1335
63	Educational Codeforces Round 93 (Rated for Div. 2)	Aug/14/2020 17:35	9421	2	-97	1365	Became Pupil sofiaasta → sofiaasta
62	Codeforces Round 660 (Div. 2)	Jul/30/2020 17:35	2654	2	+64	1462	Became Specialist sofiaasta → sofiaasta
61	Educational Codeforces Round 92 (Rated for Div. 2)	Jul/29/2020 17:35	10213	1	-104	1398	Became Pupil sofiaasta → sofiaasta
60	Codeforces Round 659 (Div. 2)	Jul/24/2020 17:35	1717	2	+98	1502
59	Codeforces Round 658 (Div. 2)	Jul/21/2020 17:35	3641	3	+33	1404	Became Specialist sofiaasta → sofiaasta
58	Codeforces Round 657 (Div. 2)	Jul/19/2020 12:00	4463	0	-109	1371	Became Pupil sofiaasta → sofiaasta
57	Codeforces Round 656 (Div. 3)	Jul/17/2020 17:35	2964	3	-21	1480
56	Codeforces Round 654 (Div. 2)	Jul/01/2020 16:35	5303	3	-45	1501
55	Codeforces Round 653 (Div. 3)	Jun/28/2020 17:35	864	5	+54	1546
54	Educational Codeforces Round 90 (Rated for Div. 2)	Jun/25/2020 17:35	5853	3	-66	1492
53	Codeforces Round 652 (Div. 2)	Jun/23/2020 17:05	2408	3	+34	1558
52	Codeforces Round 651 (Div. 2)	Jun/20/2020 17:35	2311	3	+61	1524
51	Codeforces Global Round 8	Jun/18/2020 17:45	3470	3	+62	1463
50	Codeforces Round 650 (Div. 3)	Jun/16/2020 17:35	3357	3	-1	1401
49	Codeforces Round 649 (Div. 2)	Jun/13/2020 18:05	5189	2	-11	1402
48	Educational Codeforces Round 89 (Rated for Div. 2)	Jun/11/2020 17:35	4182	2	+19	1413	Became Specialist sofiaasta → sofiaasta
47	Codeforces Round 647 (Div. 2) - Thanks, Algo Muse!	Jun/04/2020 17:35	3561	3	+43	1394
46	Codeforces Round 646 (Div. 2)	May/31/2020 17:35	8815	1	-48	1351
45	Educational Codeforces Round 88 (Rated for Div. 2)	May/28/2020 17:35	6654	2	-29	1399	Became Pupil sofiaasta → sofiaasta
44	Codeforces Round 645 (Div. 2)	May/26/2020 17:35	4502	2	+24	1428
43	Codeforces Round 644 (Div. 3)	May/24/2020 16:35	6204	4	-67	1404
42	Educational Codeforces Round 87 (Rated for Div. 2)	May/17/2020 12:20	4428	3	-14	1471
41	Codeforces Round 643 (Div. 2)	May/16/2020 14:35	3579	3	+34	1485
40	Codeforces Round 642 (Div. 3)	May/14/2020 17:35	4620	3	-25	1451
39	Codeforces Round 641 (Div. 2)	May/12/2020 15:35	5724	1	-45	1476
38	Codeforces Round 638 (Div. 2)	May/01/2020 17:35	3353	3	+44	1521
37	Educational Codeforces Round 86 (Rated for Div. 2)	Apr/26/2020 17:35	4856	2	+12	1477
36	Codeforces Round 637 (Div. 2) - Thanks, Ivan Belonogov!	Apr/23/2020 17:45	2978	3	+71	1465	Became Specialist sofiaasta → sofiaasta
35	Codeforces Round 636 (Div. 3)	Apr/21/2020 17:35	4376	3	+11	1394
34	Codeforces Round 635 (Div. 2)	Apr/15/2020 17:35	7956	2	-40	1383	Became Pupil sofiaasta → sofiaasta
33	Codeforces Round 634 (Div. 3)	Apr/13/2020 17:35	5012	4	-14	1423
32	Codeforces Round 633 (Div. 2)	Apr/12/2020 17:05	4373	3	+1	1437
31	Educational Codeforces Round 85 (Rated for Div. 2)	Apr/10/2020 17:35	5200	2	+16	1436
30	Codeforces Round 632 (Div. 2)	Apr/08/2020 17:35	5167	2	+12	1420
29	Codeforces Round 631 (Div. 2) - Thanks, Denis aramis Shitov!	Apr/03/2020 17:35	3427	2	+51	1408	Became Specialist sofiaasta → sofiaasta
28	Codeforces Round 630 (Div. 2)	Mar/31/2020 16:35	3816	3	+90	1357
27	Codeforces Round 629 (Div. 3)	Mar/26/2020 17:35	4681	3	+59	1267
26	Codeforces Global Round 7	Mar/19/2020 17:35	6895	2	+12	1208	Became Pupil sofiaasta → sofiaasta
25	Educational Codeforces Round 83 (Rated for Div. 2)	Mar/09/2020 17:35	4190	2	+55	1196
24	Codeforces Round 626 (Div. 2, based on Moscow Open Olympiad in Informatics)	Mar/07/2020 12:35	4566	1	-67	1141	Became Newbie sofiaasta → sofiaasta
23	CodeCraft-20 (Div. 2)	Mar/04/2020 17:35	4165	1	+9	1208	Became Pupil sofiaasta → sofiaasta
22	Ozon Tech Challenge 2020 (Div.1 + Div.2, Rated, T-shirts + prizes!)	Mar/03/2020 17:35	4970	2	+13	1199
21	Codeforces Round 624 (Div. 3)	Feb/24/2020 17:35	4556	2	-18	1186	Became Newbie sofiaasta → sofiaasta
20	Codeforces Round 621 (Div. 1 + Div. 2)	Feb/17/2020 18:35	6324	1	-78	1204
19	Codeforces Round 620 (Div. 2)	Feb/15/2020 16:05	6347	1	-63	1282
18	Codeforces Round 618 (Div. 2)	Feb/09/2020 17:05	4081	2	0	1345
17	Codeforces Round 616 (Div. 2)	Feb/02/2020 17:05	4021	2	-5	1345
16	Educational Codeforces Round 81 (Rated for Div. 2)	Jan/29/2020 17:35	3669	1	+26	1350
15	Codeforces Round 614 (Div. 2)	Jan/19/2020 16:35	3357	2	+18	1324
14	Codeforces Round 613 (Div. 2)	Jan/10/2020 17:05	2861	3	+64	1306
13	Codeforces Round 612 (Div. 2)	Jan/05/2020 17:05	5146	1	-69	1242
12	Hello 2020	Jan/04/2020 15:05	5480	1	-25	1311
11	Good Bye 2019	Dec/29/2019 17:05	3667	3	+45	1336
10	Codeforces Round 610 (Div. 2)	Dec/24/2019 17:35	4559	1	-71	1291
9	Educational Codeforces Round 78 (Rated for Div. 2)	Dec/19/2019 17:35	3508	1	-31	1362
8	Codeforces Global Round 6	Dec/17/2019 18:05	2098	3	+80	1393
7	Codeforces Round 605 (Div. 3)	Dec/12/2019 16:35	1742	3	+53	1313
6	Codeforces Round 604 (Div. 2)	Dec/05/2019 17:35	4343	1	-62	1260
5	Codeforces Round 603 (Div. 2)	Nov/29/2019 17:35	2879	2	+10	1322
4	Codeforces Round 601 (Div. 2)	Nov/19/2019 17:35	2610	2	+22	1312
3	Codeforces Round 600 (Div. 2)	Nov/16/2019 17:35	4822	1	-61	1290
2	Educational Codeforces Round 76 (Rated for Div. 2)	Nov/13/2019 17:35	5541	2	-85	1351	Became Pupil sofiaasta → sofiaasta
1	Codeforces Round 598 (Div. 3)	Nov/04/2019 16:15	3889	1	-64	1436	Became Specialist sofiaasta → sofiaasta

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