Codeforces Round 224 (Div. 2)

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ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
382 Codeforces Round 224 (Div. 2) FINISHED False 7200 347725797 Jan. 17, 2014, 3:30 p.m.

Problems

Solved$
Index
Name
Type
Tags
Community Tag
Rating
( 384 ) E Ksenia and Combinatorics PROGRAMMING combinatorics dp 2600

B"Ksenia has her winter exams. Today she is learning combinatorics. Here's one of the problems she needs to learn to solve. How many distinct trees are there consisting of n vertices, each with the following properties: Two trees are considered distinct if there are such two vertices u and v, that in one tree they are connected by an edge and in the other tree they are not. Help Ksenia solve the problem for the given n and k. As the answer to the problem can be very huge you should output it modulo 1000000007 (109 xe2 x80 x89+ xe2 x80 x897). The first line contains two integers n, xe2 x80 x89k (1 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89n, xe2 x80 x89k xe2 x80 x89 xe2 x89 xa4 xe2 x80 x8950). Print a single integer -- the answer to the problem modulo 1000000007 (109 xe2 x80 x89+ xe2 x80 x897). If you aren't familiar with matchings, please, read the following link: http://en.wikipedia.org/wiki/Matching_(graph_theory)."...

Tutorials

Codeforces Round #224 (Div. 2) Editorial

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
5722433 Gassa E Jan. 17, 2014, 5:22 p.m. OK D TESTS 66 46 102400 2600
5726419 Gassa E Jan. 17, 2014, 9:37 p.m. OK D TESTS 66 62 102400 2600
5726511 Gassa E Jan. 17, 2014, 9:56 p.m. OK D TESTS 66 77 102400 2600
5726496 Gassa E Jan. 17, 2014, 9:53 p.m. OK D TESTS 66 77 102400 2600
5726467 Gassa E Jan. 17, 2014, 9:47 p.m. OK D TESTS 66 77 102400 2600
15460414 lijiayao E Jan. 21, 2016, 12:25 a.m. OK GNU C++ TESTS 66 15 0 2600
15452845 yashen E Jan. 20, 2016, 12:16 p.m. OK GNU C++ TESTS 66 15 0 2600
5727935 Suzuka E Jan. 18, 2014, 3:43 a.m. OK GNU C++ TESTS 66 15 0 2600
15461769 potouiuiiiu E Jan. 21, 2016, 3:07 a.m. OK GNU C++ TESTS 66 15 102400 2600
15461426 jokerbalabala E Jan. 21, 2016, 2:26 a.m. OK GNU C++ TESTS 66 15 102400 2600
15460708 potouiuiiiu E Jan. 21, 2016, 1:01 a.m. OK GNU C++ TESTS 66 15 102400 2600
15460681 Yaer E Jan. 21, 2016, 12:58 a.m. OK GNU C++ TESTS 66 15 102400 2600
15427064 mmsqweasd E Jan. 18, 2016, 12:47 p.m. OK GNU C++ TESTS 66 15 102400 2600
9204861 AlexJH E Dec. 20, 2014, 9:42 a.m. OK GNU C++ TESTS 66 15 102400 2600
5778273 ACMonster E Jan. 23, 2014, 3:44 p.m. OK GNU C++ TESTS 66 15 307200 2600
5873627 wakaka E Feb. 3, 2014, 12:45 p.m. OK GNU C++0x TESTS 66 31 0 2600
5721802 Rubanenko107 E Jan. 17, 2014, 5:16 p.m. OK GNU C++0x TESTS 66 46 0 2600
5724108 hex539 E Jan. 17, 2014, 6:06 p.m. OK GNU C++0x TESTS 66 46 102400 2600
7667985 Xellos E Sept. 2, 2014, 1:51 p.m. OK GNU C++0x TESTS 66 46 204800 2600
5743363 dasko1 E Jan. 20, 2014, 12:57 a.m. OK GNU C++0x TESTS 66 78 0 2600
7446066 whn6325689 E Aug. 14, 2014, 1:54 p.m. OK GNU C++0x TESTS 66 93 102400 2600
7444392 whn6325689 E Aug. 14, 2014, 9:08 a.m. OK GNU C++0x TESTS 66 93 204800 2600
5728532 sping128 E Jan. 18, 2014, 5:31 a.m. OK GNU C++0x TESTS 66 109 102400 2600
5714117 mruxim E Jan. 17, 2014, 3:58 p.m. OK GNU C++0x TESTS 66 140 0 2600
9355006 aliasadiiii E Jan. 3, 2015, 6:05 p.m. OK GNU C++0x TESTS 66 155 102400 2600
16288448 joisino E Feb. 23, 2016, 7:58 a.m. OK GNU C++11 TESTS 66 15 102400 2600
15461745 function2 E Jan. 21, 2016, 3:04 a.m. OK GNU C++11 TESTS 66 15 102400 2600
36030871 vjudge5 E March 7, 2018, 1:36 a.m. OK GNU C++11 TESTS 66 15 2150400 2600
33396352 wfj_2048 E Dec. 19, 2017, 3:38 a.m. OK GNU C++11 TESTS 66 15 2150400 2600
33396313 wfj_2048 E Dec. 19, 2017, 3:34 a.m. OK GNU C++11 TESTS 66 15 2150400 2600
18003263 r_clover E May 20, 2016, 10:46 a.m. OK GNU C++11 TESTS 66 15 2252800 2600
20499549 lych_cys E Sept. 10, 2016, 2:50 p.m. OK GNU C++11 TESTS 66 30 0 2600
64614669 ddytxdy E Nov. 10, 2019, 4:04 a.m. OK GNU C++11 TESTS 66 31 0 2600
64614253 Jackpei E Nov. 10, 2019, 3:47 a.m. OK GNU C++11 TESTS 66 31 0 2600
64614220 Jackpei E Nov. 10, 2019, 3:46 a.m. OK GNU C++11 TESTS 66 31 0 2600
32950640 Flash-boy E Dec. 5, 2017, 2:17 p.m. OK GNU C++14 TESTS 66 15 2048000 2600
33975307 Flash-boy E Jan. 7, 2018, 2:43 a.m. OK GNU C++14 TESTS 66 30 1945600 2600
67958072 mota_haathi E Dec. 30, 2019, 10:27 a.m. OK GNU C++14 TESTS 66 31 0 2600
56848965 cloudsky01 E July 11, 2019, 2:49 p.m. OK GNU C++14 TESTS 66 31 0 2600
30957808 sz1231 E Oct. 3, 2017, 4:36 a.m. OK GNU C++14 TESTS 66 31 204800 2600
38073084 MAMBA E May 9, 2018, 1:39 p.m. OK GNU C++14 TESTS 66 31 3379200 2600
37794960 orbitingflea E May 1, 2018, 10:18 a.m. OK GNU C++14 TESTS 66 31 3379200 2600
39601827 Powerslave E June 24, 2018, 12:24 p.m. OK GNU C++14 TESTS 66 46 0 2600
38379611 N3SL E May 17, 2018, 6:54 p.m. OK GNU C++14 TESTS 66 46 307200 2600
63633965 idxcalcal E Oct. 28, 2019, 7:28 a.m. OK GNU C++14 TESTS 66 46 512000 2600
62925465 hjk1030 E Oct. 19, 2019, 11:12 a.m. OK GNU C++17 TESTS 66 31 0 2600
61526429 kefaa2 E Sept. 29, 2019, 10:56 p.m. OK GNU C++17 TESTS 66 31 0 2600
40236842 dream_maker E July 12, 2018, 3:26 p.m. OK GNU C++17 TESTS 66 31 102400 2600
50318371 Dance_Of_Faith E Feb. 22, 2019, 1:19 p.m. OK GNU C++17 TESTS 66 31 204800 2600
56604014 ruo E July 6, 2019, 3:05 a.m. OK GNU C++17 TESTS 66 31 307200 2600
49687829 Hacheylight E Feb. 10, 2019, 8:48 a.m. OK GNU C++17 TESTS 66 31 307200 2600
68141945 saketh E Jan. 3, 2020, 11:37 p.m. OK GNU C++17 TESTS 66 61 0 2600
56503769 AliShahali1382 E July 4, 2019, 7:31 a.m. OK GNU C++17 TESTS 66 61 102400 2600
67870814 AM. E Dec. 29, 2019, 11:23 a.m. OK GNU C++17 TESTS 66 62 102400 2600
68141231 xiaowuc1 E Jan. 3, 2020, 10:44 p.m. OK GNU C++17 TESTS 66 78 1126400 2600
8378059 islam-al-aarag E Oct. 24, 2014, 1:46 p.m. OK Java 6 TESTS 66 202 0 2600
5719506 qwerty787788 E Jan. 17, 2014, 4:51 p.m. OK Java 7 TESTS 66 78 0 2600
5723314 VArtem E Jan. 17, 2014, 5:29 p.m. OK Java 7 TESTS 66 78 307200 2600
5723586 FattyPenguin E Jan. 17, 2014, 5:56 p.m. OK Java 7 TESTS 66 124 102400 2600
5822153 IgorKoval E Jan. 27, 2014, 10:14 p.m. OK Java 7 TESTS 66 140 0 2600
5723599 m.radwan E Jan. 17, 2014, 5:56 p.m. OK Java 7 TESTS 66 218 0 2600
10182134 Pimpom E March 6, 2015, 7:19 p.m. OK Java 8 TESTS 66 295 0 2600
5767966 hehaodele E Jan. 22, 2014, 3:29 a.m. OK MS C++ TESTS 66 30 204800 2600
5951144 blueseen E March 6, 2014, 1:15 p.m. OK MS C++ TESTS 66 31 204800 2600
5745880 Nakochi E Jan. 20, 2014, 11:31 a.m. OK MS C++ TESTS 66 46 0 2600
5745865 YQCMMD E Jan. 20, 2014, 11:27 a.m. OK MS C++ TESTS 66 46 0 2600
11114440 polequoll E May 16, 2015, 7:44 a.m. OK MS C++ TESTS 66 171 204800 2600
6562159 M.Mahdi E May 6, 2014, 12:27 p.m. OK MS C++ TESTS 66 187 102400 2600
5735226 tsfn E Jan. 18, 2014, 5:19 p.m. OK Ruby TESTS 66 795 102400 2600

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