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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
191	Codeforces Round 1098 (Div. 2)	May/16/2026 17:35	2599	4	-12	1583
190	Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)	Apr/25/2026 17:35	2582	3	-20	1595	Became Specialist the_stone_dawg → the_stone_dawg
189	Codeforces Round 1093 (Div. 2)	Apr/13/2026 17:35	1450	3	+10	1615
188	Codeforces Round 1089 (Div. 2)	Mar/29/2026 17:35	5256	3	-85	1605
187	Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2)	Mar/28/2026 17:45	2748	3	-24	1690
186	Codeforces Round 1073 (Div. 2)	Jan/17/2026 17:35	1984	4	-39	1714
185	Good Bye 2025	Dec/27/2025 17:35	2693	4	-11	1753
184	Codeforces Round 1064 (Div. 2)	Nov/16/2025 17:35	1784	3	-57	1764
183	Codeforces Round 1056 (Div. 2)	Oct/05/2025 19:35	465	4	+55	1821
182	Codeforces Round 1051 (Div. 2)	Sep/17/2025 17:35	623	4	+76	1766
181	Educational Codeforces Round 182 (Rated for Div. 2)	Sep/15/2025 17:35	1665	4	+12	1690
180	Codeforces Round 1049 (Div. 2)	Sep/09/2025 17:35	2717	3	-31	1678
179	Codeforces Round 1045 (Div. 2)	Aug/26/2025 17:35	772	3	+84	1709
178	Codeforces Round 1044 (Div. 2)	Aug/24/2025 17:35	4038	3	-48	1625
177	Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2)	Aug/07/2025 17:35	3088	3	-27	1673
176	Codeforces Round 1039 (Div. 2)	Jul/27/2025 17:35	3844	3	-75	1700
175	Educational Codeforces Round 181 (Rated for Div. 2)	Jul/22/2025 17:35	2784	4	-62	1775
174	Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2)	Jul/19/2025 17:35	1116	3	+67	1837
173	Educational Codeforces Round 180 (Rated for Div. 2)	Jun/23/2025 17:35	2350	3	-54	1770
172	Codeforces Round 1008 (Div. 2)	Mar/10/2025 17:45	1274	3	-29	1824
171	Educational Codeforces Round 175 (Rated for Div. 2)	Feb/27/2025 17:35	482	4	+50	1853
170	Educational Codeforces Round 174 (Rated for Div. 2)	Feb/18/2025 17:35	1924	3	-48	1803
169	Codeforces Round 1004 (Div. 2)	Feb/11/2025 17:35	465	4	+35	1851
168	Codeforces Round 997 (Div. 2)	Jan/17/2025 17:35	791	3	+29	1816
167	Good Bye 2024: 2025 is NEAR	Dec/28/2024 17:35	1332	5	+67	1787
166	Educational Codeforces Round 173 (Rated for Div. 2)	Dec/24/2024 17:35	1819	3	-21	1720
165	Codeforces Round 994 (Div. 2)	Dec/20/2024 17:35	2105	3	-32	1741
164	Codeforces Global Round 28	Dec/19/2024 17:35	1513	4	+27	1773
163	Educational Codeforces Round 172 (Rated for Div. 2)	Dec/02/2024 17:35	2380	2	-69	1746
162	Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)	Nov/30/2024 17:35	2430	4	-60	1815
161	Codeforces Round 987 (Div. 2)	Nov/15/2024 15:35	791	4	+1	1875
160	Codeforces Round 979 (Div. 2)	Oct/19/2024 17:05	474	4	+46	1874
159	Codeforces Round 976 (Div. 2) and Divide By Zero 9.0	Sep/29/2024 18:35	1590	3	-32	1828
158	Codeforces Round 975 (Div. 2)	Sep/27/2024 16:35	524	4	+24	1860
157	Codeforces Round 973 (Div. 2)	Sep/20/2024 17:35	1628	3	-41	1836
156	Codeforces Round 969 (Div. 2)	Aug/30/2024 17:35	759	4	-9	1877
155	Codeforces Round 967 (Div. 2)	Aug/20/2024 17:35	489	4	+52	1886
154	Educational Codeforces Round 169 (Rated for Div. 2)	Aug/15/2024 17:35	782	4	+42	1834
153	Codeforces Round 963 (Div. 2)	Aug/04/2024 17:35	1970	3	-30	1792
152	Educational Codeforces Round 168 (Rated for Div. 2)	Jul/30/2024 17:35	1734	4	-19	1822
151	Codeforces Round 961 (Div. 2)	Jul/23/2024 17:35	1106	4	-11	1841
150	Codeforces Round 960 (Div. 2)	Jul/20/2024 17:35	662	4	+35	1852
149	Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)	Jul/18/2024 17:35	1959	3	-14	1817
148	Codeforces Round 958 (Div. 2)	Jul/15/2024 17:35	2233	3	-61	1831
147	Codeforces Round 956 (Div. 2) and ByteRace 2024	Jul/07/2024 17:35	1143	4	-22	1892	Became Expert the_stone_dawg → the_stone_dawg
146	EPIC Institute of Technology Round Summer 2024 (Div. 1 + Div. 2)	Jun/30/2024 17:35	1474	4	-19	1914
145	Educational Codeforces Round 167 (Rated for Div. 2)	Jun/27/2024 17:35	200	4	+94	1933	Became Candidate Master the_stone_dawg → the_stone_dawg
144	Codeforces Round 955 (Div. 2, with prizes from NEAR!)	Jun/25/2024 17:35	564	4	+46	1839
143	Educational Codeforces Round 166 (Rated for Div. 2)	May/30/2024 17:35	4093	2	-103	1793
142	Codeforces Round 945 (Div. 2)	May/17/2024 17:35	236	3	+95	1896
141	Codeforces Round 942 (Div. 2)	Apr/30/2024 17:35	1045	4	-24	1801
140	Educational Codeforces Round 165 (Rated for Div. 2)	Apr/29/2024 17:35	762	4	+24	1825
139	Codeforces Round 940 (Div. 2) and CodeCraft-23	Apr/21/2024 17:35	654	4	+43	1801
138	Codeforces Round 939 (Div. 2)	Apr/13/2024 17:35	669	3	+63	1758
137	Educational Codeforces Round 164 (Rated for Div. 2)	Apr/12/2024 17:35	2864	3	-44	1695
136	Codeforces Round 931 (Div. 2)	Mar/01/2024 17:35	1434	3	-2	1739
135	think-cell Round 1	Feb/17/2024 17:35	1180	4	+63	1741
134	Codeforces Round 921 (Div. 2)	Jan/27/2024 17:45	755	3	+52	1678
133	Educational Codeforces Round 161 (Rated for Div. 2)	Jan/18/2024 17:35	1795	3	+10	1626
132	Codeforces Round 919 (Div. 2)	Jan/13/2024 17:35	4633	2	-72	1616
131	Hello 2024	Jan/06/2024 17:35	3796	3	-29	1688
130	Codeforces Round 912 (Div. 2)	Nov/30/2023 19:35	1088	3	-23	1717
129	Codeforces Round 908 (Div. 2)	Nov/07/2023 17:35	430	4	+65	1740
128	Codeforces Round 901 (Div. 2)	Sep/30/2023 17:35	4307	2	-97	1675
127	Codeforces Round 899 (Div. 2)	Sep/25/2023 17:35	577	4	+74	1772
126	Educational Codeforces Round 155 (Rated for Div. 2)	Sep/24/2023 17:35	1653	3	+1	1698
125	Codeforces Round 897 (Div. 2)	Sep/11/2023 17:35	1980	3	-24	1697
124	Codeforces Round 896 (Div. 2)	Sep/10/2023 17:05	2665	3	-80	1721
123	Educational Codeforces Round 154 (Rated for Div. 2)	Aug/31/2023 17:35	1878	3	-46	1801
122	Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2)	Aug/26/2023 17:35	1291	4	+19	1847
121	Codeforces Round 892 (Div. 2)	Aug/12/2023 17:35	282	4	+115	1828
120	Educational Codeforces Round 152 (Rated for Div. 2)	Jul/27/2023 17:35	919	4	+44	1713
119	Codeforces Round 887 (Div. 2)	Jul/23/2023 17:35	2272	2	-42	1669
118	Codeforces Round 885 (Div. 2)	Jul/16/2023 17:35	1999	2	-45	1711
117	Codeforces Round 884 (Div. 1 + Div. 2)	Jul/11/2023 17:35	4715	4	-114	1756
116	Codeforces Round 882 (Div. 2)	Jul/06/2023 17:35	905	3	-13	1870
115	Educational Codeforces Round 151 (Rated for Div. 2)	Jun/29/2023 17:35	900	4	-16	1883
114	CodeTON Round 5 (Div. 1 + Div. 2, Rated, Prizes!)	Jun/24/2023 17:05	809	4	+52	1899
113	Educational Codeforces Round 150 (Rated for Div. 2)	Jun/12/2023 17:35	566	3	+20	1847
112	Codeforces Round 877 (Div. 2)	Jun/04/2023 17:45	752	3	+17	1827
111	Codeforces Round 876 (Div. 2)	Jun/03/2023 17:35	1219	3	-43	1810
110	Codeforces Round 875 (Div. 2)	May/28/2023 17:35	529	3	+7	1853
109	Educational Codeforces Round 149 (Rated for Div. 2)	May/25/2023 17:35	2685	4	-105	1846	Became Expert the_stone_dawg → the_stone_dawg
108	Codeforces Round 870 (Div. 2)	May/05/2023 17:35	340	4	+37	1951
107	Codeforces Round 869 (Div. 2)	Apr/29/2023 17:35	97	4	+88	1914	Became Candidate Master the_stone_dawg → the_stone_dawg
106	Codeforces Round 868 (Div. 2)	Apr/27/2023 17:35	935	3	-38	1826
105	Educational Codeforces Round 147 (Rated for Div. 2)	Apr/20/2023 17:35	329	4	+49	1864
104	Codeforces Round 865 (Div. 2)	Apr/09/2023 17:45	639	3	-7	1815
103	Codeforces Round 862 (Div. 2)	Apr/02/2023 17:35	557	4	+27	1822
102	CodeTON Round 4 (Div. 1 + Div. 2, Rated, Prizes!)	Mar/31/2023 17:35	1129	4	+33	1795
101	Codeforces Round 860 (Div. 2)	Mar/26/2023 17:35	1509	3	-32	1762
100	Educational Codeforces Round 145 (Rated for Div. 2)	Mar/23/2023 17:35	339	4	+79	1794
99	Nebius Welcome Round (Div. 1 + Div. 2)	Mar/12/2023 17:35	1389	3	+35	1715
98	Codeforces Round 856 (Div. 2)	Mar/04/2023 20:35	1380	3	-40	1680
97	Educational Codeforces Round 144 (Rated for Div. 2)	Feb/28/2023 17:35	1135	3	-3	1720
96	Codeforces Round 854 by cybercats (Div. 1 + Div. 2)	Feb/27/2023 17:35	2625	2	-90	1723
95	Codeforces Round 853 (Div. 2)	Feb/25/2023 17:20	1049	3	-30	1813
94	Educational Codeforces Round 143 (Rated for Div. 2)	Feb/16/2023 17:35	714	4	-4	1843
93	Codeforces Round 851 (Div. 2)	Feb/09/2023 17:35	328	4	+77	1847
92	Codeforces Round 848 (Div. 2)	Feb/01/2023 17:35	575	3	+48	1770
91	TypeDB Forces 2023 (Div. 1 + Div. 2, Rated, Prizes!)	Jan/29/2023 17:35	1305	3	+45	1722
90	Educational Codeforces Round 142 (Rated for Div. 2)	Jan/24/2023 17:35	981	4	+32	1677
89	Educational Codeforces Round 141 (Rated for Div. 2)	Jan/08/2023 17:35	1603	3	+10	1645
88	Codeforces Round 842 (Div. 2)	Jan/05/2023 17:35	443	4	+145	1635	Became Expert the_stone_dawg → the_stone_dawg
87	Hello 2023	Jan/03/2023 17:35	11577	2	-151	1490	Became Specialist the_stone_dawg → the_stone_dawg
86	Good Bye 2022: 2023 is NEAR	Dec/30/2022 17:35	3353	2	-8	1641
85	Codeforces Round 841 (Div. 2) and Divide by Zero 2022	Dec/27/2022 17:35	2082	3	-25	1649
84	Educational Codeforces Round 139 (Rated for Div. 2)	Dec/12/2022 17:35	1071	4	+22	1674
83	Codeforces Round 837 (Div. 2)	Dec/11/2022 18:35	2158	2	-42	1652
82	Pinely Round 1 (Div. 1 + Div. 2)	Nov/20/2022 17:35	1572	3	+6	1694
81	Codeforces Round 833 (Div. 2)	Nov/12/2022 17:35	859	3	+32	1688
80	Codeforces Round 828 (Div. 3)	Oct/16/2022 17:35	320	5	+62	1656	Became Expert the_stone_dawg → the_stone_dawg
79	Codeforces Global Round 23	Oct/15/2022 17:35	1758	3	+59	1594
78	Codeforces Round 826 (Div. 3)	Oct/11/2022 17:35	1782	4	-16	1535
77	Codeforces Round 825 (Div. 2)	Oct/10/2022 17:35	2814	3	-28	1551
76	Dytechlab Cup 2022	Oct/07/2022 17:35	1932	3	+10	1579
75	Educational Codeforces Round 135 (Rated for Div. 2)	Sep/08/2022 17:35	4171	2	-78	1569	Became Specialist the_stone_dawg → the_stone_dawg
74	Codeforces Round 814 (Div. 2)	Aug/16/2022 17:35	4292	2	-98	1647
73	Codeforces Round 813 (Div. 2)	Aug/13/2022 17:35	339	4	+135	1745
72	CodeTON Round 2 (Div. 1 + Div. 2, Rated, Prizes!)	Jul/31/2022 17:05	2553	3	+3	1610
71	Educational Codeforces Round 131 (Rated for Div. 2)	Jul/08/2022 17:35	2660	3	-31	1607
70	Codeforces Round 803 (Div. 2)	Jun/28/2022 17:35	2717	3	-45	1638
69	Codeforces Global Round 21	Jun/25/2022 17:35	2715	3	-32	1683
68	Codeforces Round 801 (Div. 2) and EPIC Institute of Technology Round	Jun/18/2022 17:35	437	3	+99	1715
67	Codeforces Round 800 (Div. 2)	Jun/16/2022 17:35	1765	3	-9	1616
66	Codeforces Round 796 (Div. 2)	Jun/03/2022 17:35	2889	2	-56	1625
65	CodeCraft-22 and Codeforces Round 795 (Div. 2)	May/31/2022 17:35	1304	3	+7	1681
64	Codeforces Round 794 (Div. 2)	May/25/2022 20:35	648	3	+25	1674
63	Educational Codeforces Round 129 (Rated for Div. 2)	May/23/2022 17:35	1460	4	+12	1649
62	Codeforces Round 793 (Div. 2)	May/22/2022 17:35	2498	3	-43	1637
61	Codeforces Round 792 (Div. 1 + Div. 2)	May/19/2022 17:35	2109	3	-4	1680
60	Educational Codeforces Round 128 (Rated for Div. 2)	May/13/2022 17:35	713	3	+61	1684
59	Codeforces Round 789 (Div. 2)	May/08/2022 17:35	835	3	+44	1623	Became Expert the_stone_dawg → the_stone_dawg
58	Codeforces Global Round 20	Apr/23/2022 17:05	2887	3	-40	1579	Became Specialist the_stone_dawg → the_stone_dawg
57	Codeforces Round 781 (Div. 2)	Apr/08/2022 17:35	1553	3	-4	1619
56	Codeforces Round 779 (Div. 2)	Mar/27/2022 17:35	1798	3	-12	1623
55	CodeTON Round 1 (Div. 1 + Div. 2, Rated, Prizes!)	Mar/24/2022 17:35	2623	3	-6	1635
54	Educational Codeforces Round 125 (Rated for Div. 2)	Mar/22/2022 17:45	570	4	+107	1641	Became Expert the_stone_dawg → the_stone_dawg
53	Codeforces Round 777 (Div. 2)	Mar/11/2022 17:35	3286	3	-42	1534
52	Educational Codeforces Round 124 (Rated for Div. 2)	Mar/10/2022 17:35	2810	3	-39	1576	Became Specialist the_stone_dawg → the_stone_dawg
51	Codeforces Round 774 (Div. 2)	Mar/04/2022 18:35	1338	3	+13	1615
50	Codeforces Round 770 (Div. 2)	Feb/06/2022 17:35	2153	3	+4	1602	Became Expert the_stone_dawg → the_stone_dawg
49	Educational Codeforces Round 122 (Rated for Div. 2)	Jan/31/2022 17:35	910	4	+78	1598
48	Codeforces Round 769 (Div. 2)	Jan/30/2022 17:35	9395	1	-129	1520	Became Specialist the_stone_dawg → the_stone_dawg
47	Codeforces Round 768 (Div. 2)	Jan/27/2022 17:35	3265	3	-62	1649
46	Codeforces Round 767 (Div. 2)	Jan/22/2022 17:35	684	4	+55	1711
45	Codeforces Round 766 (Div. 2)	Jan/15/2022 17:35	1409	3	+14	1656
44	Hello 2022	Jan/03/2022 17:35	2340	3	+18	1642
43	Educational Codeforces Round 118 (Rated for Div. 2)	Dec/01/2021 17:35	2096	3	-21	1624
42	Codeforces Round 755 (Div. 2, based on Technocup 2022 Elimination Round 2)	Nov/14/2021 09:05	514	3	+35	1645
41	Codeforces Round 754 (Div. 2)	Nov/12/2021 17:35	1707	3	-1	1610
40	Codeforces Round 753 (Div. 3)	Nov/02/2021 17:35	464	5	+49	1611	Became Expert the_stone_dawg → the_stone_dawg
39	Codeforces Round 752 (Div. 2)	Oct/30/2021 17:35	869	4	+69	1562
38	Educational Codeforces Round 116 (Rated for Div. 2)	Oct/29/2021 17:35	2488	3	+8	1493
37	Codeforces Round 748 (Div. 3)	Oct/13/2021 17:35	1489	4	+12	1485
36	Codeforces Round 747 (Div. 2)	Oct/08/2021 18:05	2020	4	+18	1473
35	Codeforces Round 744 (Div. 3)	Sep/28/2021 17:35	1900	4	+6	1455
34	Educational Codeforces Round 114 (Rated for Div. 2)	Sep/20/2021 17:35	7056	1	-114	1449
33	Codeforces Global Round 16	Sep/12/2021 17:35	3601	4	-40	1563	Became Specialist the_stone_dawg → the_stone_dawg
32	Educational Codeforces Round 113 (Rated for Div. 2)	Sep/08/2021 17:35	2529	3	-26	1603
31	Deltix Round, Summer 2021 (open for everyone, rated, Div. 1 + Div. 2)	Aug/29/2021 17:35	1825	3	+46	1629	Became Expert the_stone_dawg → the_stone_dawg
30	Codeforces Round 741 (Div. 2)	Aug/26/2021 17:35	3515	3	-56	1583	Became Specialist the_stone_dawg → the_stone_dawg
29	Harbour.Space Scholarship Contest 2021-2022 (open for everyone, rated, Div. 1 + Div. 2)	Jul/22/2021 17:35	5367	2	-110	1639
28	Codeforces Round 733 (Div. 1 + Div. 2, based on VK Cup 2021 - Elimination (Engine))	Jul/17/2021 17:35	1954	4	-10	1749
27	Educational Codeforces Round 111 (Rated for Div. 2)	Jul/14/2021 17:35	1550	3	-9	1759
26	Educational Codeforces Round 108 (Rated for Div. 2)	Apr/29/2021 17:35	1577	4	-24	1768
25	Contest 2050 and Codeforces Round 718 (Div. 1 + Div. 2)	Apr/23/2021 17:35	887	4	+99	1792
24	Codeforces Round 717 (Div. 2)	Apr/21/2021 16:35	732	3	+76	1693
23	Codeforces Round 716 (Div. 2)	Apr/19/2021 16:35	1639	3	+6	1617
22	Codeforces Round 715 (Div. 2)	Apr/16/2021 17:35	2543	2	-45	1611
21	Educational Codeforces Round 107 (Rated for Div. 2)	Apr/12/2021 17:35	1236	4	+24	1656
20	Divide by Zero 2021 and Codeforces Round 714 (Div. 2)	Apr/11/2021 17:35	1679	3	-2	1632
19	Codeforces Round 713 (Div. 3)	Apr/10/2021 17:35	243	6	+91	1634	Became Expert the_stone_dawg → the_stone_dawg
18	Codeforces Round 712 (Div. 2)	Apr/03/2021 17:35	2241	3	-13	1543
17	CodeCraft-21 and Codeforces Round 711 (Div. 2)	Mar/29/2021 17:35	718	3	+123	1556
16	Codeforces Round 710 (Div. 3)	Mar/25/2021 17:35	1470	4	+32	1433
15	Educational Codeforces Round 106 (Rated for Div. 2)	Mar/18/2021 17:50	4460	2	-42	1401
14	Codeforces Round 705 (Div. 2)	Mar/06/2021 17:05	3557	2	-24	1443
13	Codeforces Round 703 (Div. 2)	Feb/18/2021 17:35	2487	2	+50	1467
12	Codeforces Round 702 (Div. 3)	Feb/16/2021 17:35	1519	5	+39	1417	Became Specialist the_stone_dawg → the_stone_dawg
11	Codeforces Round 701 (Div. 2)	Feb/12/2021 17:50	4495	2	-28	1378	Became Pupil the_stone_dawg → the_stone_dawg
10	Codeforces Round 699 (Div. 2)	Feb/05/2021 17:35	2294	3	+80	1406	Became Specialist the_stone_dawg → the_stone_dawg
9	Educational Codeforces Round 103 (Rated for Div. 2)	Jan/29/2021 17:35	5627	2	-1	1326
8	Codeforces Round 698 (Div. 2)	Jan/28/2021 17:35	7131	2	-51	1327
7	Codeforces Round 696 (Div. 2)	Jan/19/2021 17:35	3496	2	+30	1378
6	Educational Codeforces Round 102 (Rated for Div. 2)	Jan/14/2021 17:35	5529	2	+22	1348
5	Codeforces Round 695 (Div. 2)	Jan/08/2021 17:35	4309	1	+113	1326
4	Codeforces Round 694 (Div. 2)	Jan/05/2021 17:35	3282	3	+191	1213	Became Pupil the_stone_dawg → the_stone_dawg
3	Codeforces Round 693 (Div. 3)	Jan/04/2021 17:35	5059	3	+222	1022
2	Good Bye 2020	Dec/30/2020 17:35	9732	2	+256	800
1	Educational Codeforces Round 101 (Rated for Div. 2)	Dec/28/2020 17:35	2724	3	+544	544	the_stone_dawg → the_stone_dawg

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