Contests - Codeforces

→ Pay attention

Before contest
Codeforces Round 1123 (Div. 2)
11:51:44
Register now »

*has extra registration

→ Streams

Codeforces Round 1123 Solution Discussion

By aryanc403

Before stream 14:16:43

View all →

→ Top rated

#	User	Rating
1	jiangly	3810
2	Benq	3676
3	Kevin114514	3655
4	maroonrk	3463
5	strapple	3447
6	Um_nik	3387
7	heuristica	3322
8	turmax	3317
9	tourist	3307
10	jiangbowen	3291

Countries | Cities | Organizations

View all →

→ Top contributors

#	User	Contrib.
1	Qingyu	156
2	nik_exists	150
2	maspy	150
4	Um_nik	141
5	Errichto	139
6	adamant	137
7	AmShZ	136
8	BledDest	132
9	maroonrk	131
10	qwexd	129

View all →

→ Find user

→ Recent actions

Detailed →

Contests

#	Contest	Start time	Rank	Solved	Rating change	New rating
161	Educational Codeforces Round 92 (Rated for Div. 2)	Jul/29/2020 17:35	2569	3	-24	1739
160	Codeforces Round 659 (Div. 2)	Jul/24/2020 17:35	590	2	+89	1763
159	Codeforces Round 658 (Div. 2)	Jul/21/2020 17:35	908	4	+71	1674
158	Codeforces Global Round 9	Jul/04/2020 17:45	1986	3	+102	1603	Became Expert _Lumos → _Lumos
157	Codeforces Round 654 (Div. 2)	Jul/01/2020 16:35	6815	2	-78	1501
156	Codeforces Round 653 (Div. 3)	Jun/28/2020 17:35	908	5	+37	1579
155	Educational Codeforces Round 90 (Rated for Div. 2)	Jun/25/2020 17:35	3512	3	-16	1542
154	Codeforces Round 652 (Div. 2)	Jun/23/2020 17:05	5628	2	-68	1558	Became Specialist _Lumos → _Lumos
153	Codeforces Round 651 (Div. 2)	Jun/20/2020 17:35	2345	3	+19	1626
152	Codeforces Round 648 (Div. 2)	Jun/07/2020 17:35	3958	3	-26	1607
151	Codeforces Round 646 (Div. 2)	May/31/2020 17:35	2834	3	+16	1633
150	Educational Codeforces Round 88 (Rated for Div. 2)	May/28/2020 17:35	3565	2	-19	1617
149	Codeforces Round 645 (Div. 2)	May/26/2020 17:35	5045	2	-61	1636
148	Codeforces Round 643 (Div. 2)	May/16/2020 14:35	545	4	+153	1697	Became Expert _Lumos → _Lumos
147	Codeforces Round 641 (Div. 2)	May/12/2020 15:35	5399	1	-56	1544	Became Specialist _Lumos → _Lumos
146	Codeforces Round 638 (Div. 2)	May/01/2020 17:35	3512	3	+8	1600	Became Expert _Lumos → _Lumos
145	Educational Codeforces Round 86 (Rated for Div. 2)	Apr/26/2020 17:35	6408	2	-60	1592	Became Specialist _Lumos → _Lumos
144	Codeforces Round 635 (Div. 2)	Apr/15/2020 17:35	2888	3	-10	1652
143	Codeforces Round 633 (Div. 2)	Apr/12/2020 17:05	3617	3	-51	1662
142	Educational Codeforces Round 85 (Rated for Div. 2)	Apr/10/2020 17:35	1189	4	+75	1713
141	Codeforces Round 632 (Div. 2)	Apr/08/2020 17:35	1827	3	+58	1638	Became Expert _Lumos → _Lumos
140	Codeforces Round 631 (Div. 2) - Thanks, Denis aramis Shitov!	Apr/03/2020 17:35	2793	2	+6	1580
139	Codeforces Round 629 (Div. 3)	Mar/26/2020 17:35	1657	3	+25	1574
138	Codeforces Round 628 (Div. 2)	Mar/14/2020 17:35	4782	2	-67	1549	Became Specialist _Lumos → _Lumos
137	Codeforces Round 627 (Div. 3)	Mar/12/2020 16:05	444	5	+67	1616	Became Expert _Lumos → _Lumos
136	Educational Codeforces Round 83 (Rated for Div. 2)	Mar/09/2020 17:35	1925	3	+29	1549
135	Codeforces Round 626 (Div. 2, based on Moscow Open Olympiad in Informatics)	Mar/07/2020 12:35	953	3	+68	1520
134	Ozon Tech Challenge 2020 (Div.1 + Div.2, Rated, T-shirts + prizes!)	Mar/03/2020 17:35	3591	2	-3	1452
133	Codeforces Round 625 (Div. 2, based on Technocup 2020 Final Round)	Mar/01/2020 16:15	4323	1	-99	1455
132	Codeforces Round 621 (Div. 1 + Div. 2)	Feb/17/2020 18:35	2968	2	-18	1554
131	Codeforces Round 619 (Div. 2)	Feb/13/2020 17:35	2560	2	-8	1572
130	Educational Codeforces Round 82 (Rated for Div. 2)	Feb/12/2020 17:35	1645	3	+52	1580
129	Codeforces Round 616 (Div. 2)	Feb/02/2020 17:05	4730	1	-81	1528	Became Specialist _Lumos → _Lumos
128	Codeforces Round 615 (Div. 3)	Jan/22/2020 17:35	612	4	+59	1609	Became Expert _Lumos → _Lumos
127	Codeforces Round 614 (Div. 2)	Jan/19/2020 16:35	2448	3	-22	1550
126	Codeforces Round 613 (Div. 2)	Jan/10/2020 17:05	3707	2	-69	1572	Became Specialist _Lumos → _Lumos
125	Codeforces Round 612 (Div. 2)	Jan/05/2020 17:05	898	2	+34	1641
124	Good Bye 2019	Dec/29/2019 17:05	2602	3	+2	1607
123	Codeforces Round 611 (Div. 3)	Dec/28/2019 20:05	452	4	+43	1605	Became Expert _Lumos → _Lumos
122	Educational Codeforces Round 79 (Rated for Div. 2)	Dec/27/2019 17:40	1877	3	+7	1562
121	Codeforces Round 610 (Div. 2)	Dec/24/2019 17:35	3102	1	-73	1555	Became Specialist _Lumos → _Lumos
120	Educational Codeforces Round 78 (Rated for Div. 2)	Dec/19/2019 17:35	1614	2	-8	1628
119	Educational Codeforces Round 74 (Rated for Div. 2)	Oct/08/2019 17:35	1602	3	-3	1636
118	Codeforces Round 590 (Div. 3)	Oct/01/2019 17:35	496	5	+44	1639	Became Expert _Lumos → _Lumos
117	Codeforces Round 588 (Div. 2)	Sep/23/2019 17:05	682	3	+77	1595
116	Codeforces Round 587 (Div. 3)	Sep/21/2019 10:05	867	3	+14	1518
115	Codeforces Round 585 (Div. 2)	Sep/15/2019 13:35	2199	2	-21	1504
114	Codeforces Round 582 (Div. 3)	Aug/30/2019 17:35	626	5	+74	1525
113	Manthan, Codefest 19 (open for everyone, rated, Div. 1 + Div. 2)	Aug/25/2019 17:35	3581	1	-23	1451
112	Educational Codeforces Round 71 (Rated for Div. 2)	Aug/22/2019 17:35	2711	2	+3	1474
111	Codeforces Round 581 (Div. 2)	Aug/20/2019 17:35	3129	2	-2	1471
110	Codeforces Round 580 (Div. 2)	Aug/18/2019 16:45	4221	3	-67	1473
109	Codeforces Round 579 (Div. 3)	Aug/13/2019 17:35	1389	4	-2	1540
108	Codeforces Round 578 (Div. 2)	Aug/11/2019 15:35	3202	2	-42	1542
107	Codeforces Round 577 (Div. 2)	Aug/04/2019 19:35	1658	3	-10	1584
106	Codeforces Round 575 (Div. 3)	Jul/24/2019 17:35	286	5	+93	1594
105	Educational Codeforces Round 69 (Rated for Div. 2)	Jul/22/2019 17:35	2602	3	-20	1501
104	Codeforces Round 573 (Div. 2)	Jul/12/2019 17:35	3004	2	-55	1521
103	Codeforces Round 572 (Div. 2)	Jul/05/2019 18:05	2098	3	-50	1576	Became Specialist _Lumos → _Lumos
102	Educational Codeforces Round 67 (Rated for Div. 2)	Jun/30/2019 17:45	1076	2	+19	1626
101	Codeforces Round 570 (Div. 3)	Jun/26/2019 17:35	349	4	+66	1607	Became Expert _Lumos → _Lumos
100	Codeforces Round 569 (Div. 2)	Jun/21/2019 20:05	2320	1	-72	1541	Became Specialist _Lumos → _Lumos
99	Codeforces Round 568 (Div. 2)	Jun/19/2019 17:45	1574	4	-10	1613
98	Codeforces Round 567 (Div. 2)	Jun/16/2019 12:35	1376	2	-13	1623
97	Codeforces Round 555 (Div. 3)	Apr/26/2019 17:35	51	5	+190	1636	Became Expert _Lumos → _Lumos
96	Codeforces Round 554 (Div. 2)	Apr/24/2019 17:35	3438	1	-69	1446
95	Educational Codeforces Round 63 (Rated for Div. 2)	Apr/22/2019 17:35	1075	3	+62	1515
94	Forethought Future Cup - Elimination Round	Apr/20/2019 21:05	2365	1	-99	1453
93	Codeforces Round 552 (Div. 3)	Apr/16/2019 17:35	733	4	+31	1552
92	Codeforces Round 550 (Div. 3)	Mar/31/2019 17:05	1332	4	-25	1521
91	Codeforces Round 549 (Div. 2)	Mar/30/2019 20:10	660	3	+68	1546
90	Codeforces Round 547 (Div. 3)	Mar/19/2019 17:35	841	4	+56	1478
89	Codeforces Round 546 (Div. 2)	Mar/11/2019 19:35	2212	2	-21	1422
88	Codeforces Round 542 [Alex Lopashev Thanks-Round] (Div. 2)	Feb/24/2019 18:35	2597	1	-64	1443
87	Codeforces Round 541 (Div. 2)	Feb/23/2019 13:20	2472	3	-41	1507
86	Codeforces Round 539 (Div. 2)	Feb/16/2019 19:35	2564	2	-67	1548	Became Specialist _Lumos → _Lumos
85	Educational Codeforces Round 59 (Rated for Div. 2)	Jan/26/2019 18:35	1118	3	+7	1615
84	Codeforces Round 535 (Div. 3)	Jan/23/2019 17:35	180	5	+119	1608	Became Expert _Lumos → _Lumos
83	Codeforces Round 534 (Div. 2)	Jan/22/2019 17:35	1956	3	+3	1489
82	Codeforces Round 533 (Div. 2)	Jan/20/2019 15:05	1839	3	+21	1486
81	Educational Codeforces Round 58 (Rated for Div. 2)	Jan/11/2019 17:35	1936	3	+21	1465
80	Codeforces Round 530 (Div. 2)	Jan/05/2019 19:35	2782	3	-47	1444
79	Good Bye 2018	Dec/30/2018 17:35	3716	3	-15	1491
78	Educational Codeforces Round 57 (Rated for Div. 2)	Dec/28/2018 17:35	2219	2	-22	1506
77	Codeforces Round 529 (Div. 3)	Dec/27/2018 17:35	842	4	+23	1528
76	Codeforces Round 527 (Div. 3)	Dec/18/2018 17:35	309	3	+111	1505	Became Specialist _Lumos → _Lumos
75	Educational Codeforces Round 56 (Rated for Div. 2)	Dec/15/2018 17:35	2558	3	-34	1394	Became Pupil _Lumos → _Lumos
74	Codeforces Round 525 (Div. 2)	Dec/04/2018 17:35	2461	2	-27	1428
73	Educational Codeforces Round 55 (Rated for Div. 2)	Nov/28/2018 17:35	1416	2	+33	1455
72	Codeforces Round 523 (Div. 2)	Nov/22/2018 18:45	2231	1	-26	1422
71	Codeforces Round 521 (Div. 3)	Nov/16/2018 17:35	1784	3	-28	1448
70	Codeforces Round 520 (Div. 2)	Nov/14/2018 18:35	1541	2	+42	1476
69	Educational Codeforces Round 53 (Rated for Div. 2)	Oct/25/2018 17:35	2309	2	-20	1434
68	Codeforces Round 518 (Div. 2) [Thanks, Mail.Ru!]	Oct/24/2018 19:35	1998	1	-25	1454
67	Codeforces Round 515 (Div. 3)	Oct/12/2018 17:35	1182	2	-2	1479
66	Educational Codeforces Round 52 (Rated for Div. 2)	Oct/11/2018 17:50	1336	3	+47	1481
65	Codeforces Round 514 (Div. 2)	Oct/05/2018 17:35	2494	2	-24	1434
64	Codeforces Round 511 (Div. 2)	Sep/21/2018 17:35	1279	2	+38	1458
63	Educational Codeforces Round 51 (Rated for Div. 2)	Sep/20/2018 17:45	1601	3	+34	1420	Became Specialist _Lumos → _Lumos
62	Codeforces Round 509 (Div. 2)	Sep/16/2018 13:35	1516	3	+78	1386
61	Educational Codeforces Round 50 (Rated for Div. 2)	Sep/07/2018 17:35	3979	1	-85	1308
60	Codeforces Round 508 (Div. 2)	Sep/06/2018 18:35	1564	3	+78	1393
59	Codeforces Round 507 (Div. 2, based on Olympiad of Metropolises)	Sep/05/2018 19:35	2575	1	-26	1315
58	Manthan, Codefest 18 (rated, Div. 1 + Div. 2)	Sep/02/2018 17:35	2676	2	+23	1341
57	AIM Tech Round 5 (rated, Div. 1 + Div. 2)	Aug/27/2018 19:35	2256	2	+33	1318
56	Codeforces Round 506 (Div. 3)	Aug/24/2018 17:50	3146	0	-108	1285
55	Codeforces Round 505 (rated, Div. 1 + Div. 2, based on VK Cup 2018 Final)	Aug/19/2018 16:35	1662	2	+108	1393
54	Educational Codeforces Round 49 (Rated for Div. 2)	Aug/18/2018 17:35	3274	2	-10	1285
53	Codeforces Round 504 (rated, Div. 1 + Div. 2, based on VK Cup 2018 Final)	Aug/17/2018 17:35	4541	0	-117	1295	Became Pupil _Lumos → _Lumos
52	Codeforces Round 503 (by SIS, Div. 2)	Aug/11/2018 16:35	3188	2	-65	1412
51	Codeforces Round 501 (Div. 3)	Jul/31/2018 17:35	398	4	+91	1477	Became Specialist _Lumos → _Lumos
50	Codeforces Round 499 (Div. 2)	Jul/26/2018 18:05	3220	1	-69	1386	Became Pupil _Lumos → _Lumos
49	Codeforces Round 498 (Div. 3)	Jul/16/2018 17:35	1209	3	0	1455
48	Educational Codeforces Round 47 (Rated for Div. 2)	Jul/14/2018 17:35	1855	2	-11	1455
47	Codeforces Round 497 (Div. 2)	Jul/13/2018 17:35	2137	3	-32	1466
46	Codeforces Round 496 (Div. 3)	Jul/09/2018 18:35	938	3	-5	1498
45	Codeforces Round 495 (Div. 2)	Jul/05/2018 19:35	1393	3	-4	1503
44	Codeforces Round 494 (Div. 3)	Jul/03/2018 17:35	554	4	+46	1507
43	Codeforces Round 493 (Div. 2)	Jul/01/2018 17:05	2689	1	-83	1461
42	Educational Codeforces Round 46 (Rated for Div. 2)	Jun/27/2018 17:35	1216	2	+4	1544
41	Codeforces Round 492 (Div. 2) [Thanks, uDebug!]	Jun/24/2018 19:35	802	3	+39	1540
40	Codeforces Round 491 (Div. 2)	Jun/23/2018 18:35	1737	3	-5	1501
39	Codeforces Round 490 (Div. 3)	Jun/21/2018 17:35	613	3	+38	1506
38	Codeforces Round 489 (Div. 2)	Jun/18/2018 19:35	932	2	+75	1468	Became Specialist _Lumos → _Lumos
37	Codeforces Round 488 by NEAR (Div. 2)	Jun/16/2018 19:35	1525	2	+10	1393
36	Codeforces Round 487 (Div. 2)	Jun/11/2018 16:35	1427	2	+75	1383
35	Educational Codeforces Round 45 (Rated for Div. 2)	Jun/10/2018 13:05	2279	2	+18	1308
34	Codeforces Round 486 (Div. 3)	Jun/01/2018 17:35	1628	2	+35	1290
33	Codeforces Round 485 (Div. 2)	May/29/2018 18:35	2974	2	-39	1255
32	Avito Code Challenge 2018	May/27/2018 17:50	2254	2	-31	1294
31	Educational Codeforces Round 44 (Rated for Div. 2)	May/21/2018 17:45	2439	2	-22	1325
30	Codeforces Round 484 (Div. 2)	May/17/2018 19:35	1554	2	+49	1347
29	Codeforces Round 482 (Div. 2)	May/14/2018 17:35	2184	1	+37	1298
28	Codeforces Round 481 (Div. 3)	May/13/2018 12:05	1929	3	-7	1261
27	Codeforces Round 480 (Div. 2)	May/08/2018 18:05	3069	1	-49	1268
26	Codeforces Round 479 (Div. 3)	May/06/2018 17:05	1048	4	+87	1317
25	Codeforces Round 478 (Div. 2)	May/01/2018 17:05	2268	2	-28	1230
24	Educational Codeforces Round 43 (Rated for Div. 2)	Apr/30/2018 17:40	2176	2	-7	1258
23	Codeforces Round 477 (rated, Div. 2, based on VK Cup 2018 Round 3)	Apr/29/2018 16:15	1791	2	-35	1265
22	Codeforces Round 476 (Div. 2) [Thanks, Telegram!]	Apr/25/2018 20:35	1165	2	+15	1300
21	Tinkoff Internship Warmup Round 2018 and Codeforces Round 475 (Div. 2)	Apr/17/2018 17:05	1781	1	-24	1285
20	Educational Codeforces Round 42 (Rated for Div. 2)	Apr/10/2018 17:35	1376	3	+74	1309
19	Divide by Zero 2018 and Codeforces Round 474 (Div. 1 + Div. 2, combined)	Apr/07/2018 19:05	2405	1	+2	1235
18	Educational Codeforces Round 41 (Rated for Div. 2)	Apr/04/2018 17:05	2545	2	-23	1233
17	Codeforces Round 473 (Div. 2)	Apr/03/2018 19:05	2777	2	-34	1256
16	Codeforces Round 472 (rated, Div. 2, based on VK Cup 2018 Round 2)	Mar/24/2018 18:35	1627	1	+9	1290
15	Codeforces Round 471 (Div. 2)	Mar/23/2018 19:35	1822	1	-7	1281
14	Codeforces Round 469 (Div. 2)	Mar/09/2018 11:10	1682	2	+18	1288
13	Educational Codeforces Round 39 (Rated for Div. 2)	Mar/06/2018 18:05	867	3	+141	1270	Became Pupil _Lumos → _Lumos
12	Codeforces Round 467 (Div. 2)	Feb/25/2018 19:05	2750	1	-10	1129
11	Codeforces Round 466 (Div. 2)	Feb/24/2018 12:35	2353	0	-95	1139	Became Newbie _Lumos → _Lumos
10	Codeforces Round 465 (Div. 2)	Feb/19/2018 19:35	2492	2	+17	1234
9	Codeforces Round 464 (Div. 2)	Feb/17/2018 13:05	1787	2	+52	1217	Became Pupil _Lumos → _Lumos
8	Educational Codeforces Round 38 (Rated for Div. 2)	Feb/16/2018 18:05	1870	2	+97	1165
7	Educational Codeforces Round 37 (Rated for Div. 2)	Feb/02/2018 17:35	3267	0	-96	1068
6	Codeforces Round 459 (Div. 2)	Jan/29/2018 17:35	2972	2	+46	1164
5	Codeforces Round 456 (Div. 2)	Jan/05/2018 17:35	3965	1	-59	1118
4	Good Bye 2017	Dec/29/2017 18:40	5982	1	-75	1177	Became Newbie _Lumos → _Lumos
3	Educational Codeforces Round 35 (Rated for Div. 2)	Dec/28/2017 17:05	3132	1	-64	1252
2	Codeforces Round 455 (Div. 2)	Dec/27/2017 19:35	3045	1	-74	1316
1	Codeforces Round 454 (Div. 2, based on Technocup 2018 Elimination Round 4)	Dec/23/2017 17:05	2241	0	-110	1390	Became Pupil _Lumos → _Lumos

The only programming contests Web 2.0 platform

Server time: Sep/25/2026 05:43:17 (k3).

Desktop version, switch to mobile version.

Supported by