Educational Codeforces Round 20

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ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
803 Educational Codeforces Round 20 FINISHED False 8100 244133723 April 28, 2017, 3:05 p.m.

Problems

Solved$
Index
Name
Type
Tags
Community Tag
Rating
( 4994 ) A Maximal Binary Matrix PROGRAMMING constructive algorithms 1500

B'You are given matrix with n rows and n columns filled with zeroes. You should put k ones in it in such a way that the resulting matrix is symmetrical with respect to the main diagonal (the diagonal that goes from the top left to the bottom right corner) and is lexicographically maximal. One matrix is lexicographically greater than the other if the first different number in the first different row from the top in the first matrix is greater than the corresponding number in the second one. If there exists no such matrix then output -1. The first line consists of two numbers n and k (1 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89n xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89100, 0 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89k xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89106). If the answer exists then output resulting matrix. Otherwise output -1. '...

Tutorials

51768

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
26728647 Voudy A April 28, 2017, 4:24 p.m. OK D TESTS 168 15 3072000 1500
26724053 Denor A April 28, 2017, 3:31 p.m. OK Delphi TESTS 168 15 2560000 1500
56551134 LaSWeeG A July 5, 2019, 9:49 a.m. OK Delphi TESTS 168 46 102400 1500
27216474 Aerof A May 19, 2017, 2:27 p.m. OK FPC TESTS 168 31 0 1500
27216670 Uolken A May 19, 2017, 2:38 p.m. OK FPC TESTS 168 31 0 1500
27705187 Akulyat A June 10, 2017, 11:29 a.m. OK FPC TESTS 168 31 102400 1500
27164367 KagamiharaNadeshiko A May 16, 2017, 3:51 p.m. OK FPC TESTS 168 31 102400 1500
26833366 vjudge2 A May 4, 2017, 11:48 a.m. OK FPC TESTS 168 31 102400 1500
26815438 Shadowest A May 3, 2017, 8:46 a.m. OK FPC TESTS 168 31 1638400 1500
26763166 andrew A April 30, 2017, 7:58 a.m. OK FPC TESTS 168 31 1638400 1500
26763130 andrew A April 30, 2017, 7:54 a.m. OK FPC TESTS 168 31 1638400 1500
26740623 nikih.10 A April 29, 2017, 5:32 a.m. OK FPC TESTS 168 31 1638400 1500
26822153 Stanislav666 A May 3, 2017, 4:31 p.m. OK FPC TESTS 168 31 1638400 1500
26887312 maratonando A May 5, 2017, 6:53 p.m. OK GNU C TESTS 168 15 0 1500
26877723 mihaipriboi A May 5, 2017, 10:03 a.m. OK GNU C TESTS 168 15 0 1500
26829961 Dangerxfh A May 4, 2017, 7:34 a.m. OK GNU C TESTS 168 15 0 1500
27834965 keg9335 A June 16, 2017, 11:51 p.m. OK GNU C TESTS 168 15 0 1500
27717119 Koshlendra7 A June 11, 2017, 7:59 a.m. OK GNU C TESTS 168 15 102400 1500
27721332 gbrocks A June 11, 2017, 1:04 p.m. OK GNU C TESTS 168 15 204800 1500
28719307 vjudge4 A July 20, 2017, 9:02 a.m. OK GNU C TESTS 168 15 1945600 1500
28639569 vjudge5 A July 17, 2017, 12:40 p.m. OK GNU C TESTS 168 15 1945600 1500
28639536 vjudge3 A July 17, 2017, 12:39 p.m. OK GNU C TESTS 168 15 1945600 1500
26804359 EndangeredLahmacun A May 2, 2017, 2:27 p.m. OK GNU C TESTS 168 15 1945600 1500
31968939 vjudge4 A Nov. 2, 2017, 5:50 a.m. OK GNU C++ TESTS 168 15 0 1500
32279371 Tarrus A Nov. 13, 2017, 8:24 a.m. OK GNU C++ TESTS 168 15 0 1500
32110937 vjudge3 A Nov. 7, 2017, 6:19 a.m. OK GNU C++ TESTS 168 15 0 1500
32055787 vjudge3 A Nov. 4, 2017, 2:19 p.m. OK GNU C++ TESTS 168 15 0 1500
32041465 jadeyan A Nov. 4, 2017, 3:35 a.m. OK GNU C++ TESTS 168 15 0 1500
31897199 vjudge3 A Oct. 30, 2017, 2:53 p.m. OK GNU C++ TESTS 168 15 0 1500
31799988 vjudge2 A Oct. 27, 2017, 2:13 p.m. OK GNU C++ TESTS 168 15 0 1500
30249069 hemant A Sept. 10, 2017, 3:04 p.m. OK GNU C++ TESTS 168 15 0 1500
27764664 walaa.khafagy A June 13, 2017, 11:15 p.m. OK GNU C++ TESTS 168 15 0 1500
27670941 yasugongshang A June 8, 2017, 12:14 p.m. OK GNU C++ TESTS 168 15 0 1500
28550076 mdmahbubulhaq201711 A July 14, 2017, 1:57 p.m. OK GNU C11 TESTS 168 46 1945600 1500
26725027 orz010orz A April 28, 2017, 3:40 p.m. OK GNU C11 TESTS 168 46 1945600 1500
26734341 Chapecoense A April 28, 2017, 7:41 p.m. OK GNU C11 TESTS 168 61 1945600 1500
29174403 pikachucoding A Aug. 3, 2017, 5:52 p.m. OK GNU C11 TESTS 168 61 1945600 1500
47516989 vikr_182 A Dec. 26, 2018, 10:36 a.m. OK GNU C11 TESTS 168 62 307200 1500
26730882 amineEnsias A April 28, 2017, 5:01 p.m. OK GNU C11 TESTS 168 62 1945600 1500
26805566 xiao-xiao A May 2, 2017, 3:50 p.m. OK GNU C11 TESTS 168 62 1945600 1500
26774080 nahid0335 A April 30, 2017, 7:33 p.m. OK GNU C11 TESTS 168 62 1945600 1500
26742838 f2lk6wf90d A April 29, 2017, 7:48 a.m. OK GNU C11 TESTS 168 62 1945600 1500
27727109 shash42 A June 11, 2017, 8:25 p.m. OK GNU C++11 TESTS 168 15 0 1500
31978442 VinBat A Nov. 2, 2017, 11:51 a.m. OK GNU C++11 TESTS 168 15 0 1500
31705624 raghavwadhwa1996 A Oct. 25, 2017, 10:37 a.m. OK GNU C++11 TESTS 168 15 0 1500
27906718 lrvideckis A June 19, 2017, 2:26 p.m. OK GNU C++11 TESTS 168 15 0 1500
27723228 aka.Foda A June 11, 2017, 3:22 p.m. OK GNU C++11 TESTS 168 15 0 1500
27691476 caocao A June 9, 2017, 2:52 p.m. OK GNU C++11 TESTS 168 15 0 1500
27627101 297947648 A June 7, 2017, 7:02 a.m. OK GNU C++11 TESTS 168 15 0 1500
27624574 poojanpatel101 A June 7, 2017, 3:37 a.m. OK GNU C++11 TESTS 168 15 0 1500
27603839 yeates A June 6, 2017, 3:05 a.m. OK GNU C++11 TESTS 168 15 0 1500
27584667 kallolroy A June 5, 2017, 2:16 p.m. OK GNU C++11 TESTS 168 15 0 1500
29531861 Aayushi_Agarwal A Aug. 17, 2017, 5:40 p.m. OK GNU C++14 TESTS 168 15 0 1500
29537518 Qumeric A Aug. 17, 2017, 9:33 p.m. OK GNU C++14 TESTS 168 15 0 1500
30014123 Frez A Sept. 2, 2017, 1:50 p.m. OK GNU C++14 TESTS 168 15 0 1500
30095483 programmer21 A Sept. 5, 2017, 9:27 a.m. OK GNU C++14 TESTS 168 15 0 1500
30248877 Wolf. A Sept. 10, 2017, 2:58 p.m. OK GNU C++14 TESTS 168 15 0 1500
30267118 smit_detroja96 A Sept. 11, 2017, 1:52 p.m. OK GNU C++14 TESTS 168 15 0 1500
30291258 mahmoud2407 A Sept. 12, 2017, 4:36 p.m. OK GNU C++14 TESTS 168 15 0 1500
31124602 aky1994 A Oct. 7, 2017, 5:56 p.m. OK GNU C++14 TESTS 168 15 0 1500
31302957 Warawreh A Oct. 14, 2017, 11:31 a.m. OK GNU C++14 TESTS 168 15 0 1500
32124619 _FSMM A Nov. 7, 2017, 3:59 p.m. OK GNU C++14 TESTS 168 15 0 1500
56888059 vjudge1 A July 12, 2019, 1:38 p.m. OK GNU C++17 TESTS 168 30 0 1500
39081284 harshit15 A June 10, 2018, 1:58 a.m. OK GNU C++17 TESTS 168 30 102400 1500
69572975 Emad_Tarek A Jan. 26, 2020, 2:40 p.m. OK GNU C++17 TESTS 168 31 0 1500
68960062 mr-meeseeks A Jan. 16, 2020, 11:38 p.m. OK GNU C++17 TESTS 168 31 0 1500
67975046 ac_97 A Dec. 30, 2019, 4:32 p.m. OK GNU C++17 TESTS 168 31 0 1500
67582814 zeus_orz1 A Dec. 25, 2019, 6:56 a.m. OK GNU C++17 TESTS 168 31 0 1500
66891556 ivanilos A Dec. 14, 2019, 8:51 p.m. OK GNU C++17 TESTS 168 31 0 1500
65224051 rohitrj A Nov. 16, 2019, 11:41 p.m. OK GNU C++17 TESTS 168 31 0 1500
65253760 hosamr A Nov. 17, 2019, 12:48 p.m. OK GNU C++17 TESTS 168 31 0 1500
69576582 MO_Salah99 A Jan. 26, 2020, 3:47 p.m. OK GNU C++17 TESTS 168 31 0 1500
26733061 goC A April 28, 2017, 6:16 p.m. OK Go TESTS 168 31 23244800 1500
26724617 only_methol A April 28, 2017, 3:36 p.m. OK Go TESTS 168 46 23142400 1500
28373909 sl0th A July 8, 2017, 5:15 p.m. OK Haskell TESTS 168 31 53248000 1500
65512234 Mieack A Nov. 22, 2019, 4:48 a.m. OK Java 11 TESTS 168 249 0 1500
52244488 icpc_loser A April 2, 2019, 6:19 p.m. OK Java 8 TESTS 168 109 0 1500
27841780 Key_J A June 17, 2017, 8:49 a.m. OK Java 8 TESTS 168 109 0 1500
27418689 Killer45 A May 28, 2017, 7:14 p.m. OK Java 8 TESTS 168 109 0 1500
27183765 Kammola A May 17, 2017, 4:43 p.m. OK Java 8 TESTS 168 109 0 1500
27003124 JPaulsen A May 10, 2017, 8:51 p.m. OK Java 8 TESTS 168 109 0 1500
26925492 andrejerry1 A May 7, 2017, 2:35 p.m. OK Java 8 TESTS 168 109 0 1500
26905598 Laboon A May 6, 2017, 4:13 p.m. OK Java 8 TESTS 168 109 0 1500
26901104 nghidirimschi A May 6, 2017, 12:28 p.m. OK Java 8 TESTS 168 109 0 1500
26831734 rks_mak A May 4, 2017, 9:54 a.m. OK Java 8 TESTS 168 109 0 1500
26753233 Omar_Morsi A April 29, 2017, 5:13 p.m. OK Java 8 TESTS 168 109 20377600 1500
26723327 simonmysun A April 28, 2017, 3:24 p.m. OK JavaScript TESTS 168 31 6144000 1500
63779208 Eva A Oct. 30, 2019, 10:31 a.m. OK JavaScript TESTS 168 46 307200 1500
26898484 TRR A May 6, 2017, 10:15 a.m. OK Mono C# TESTS 168 62 512000 1500
27111804 IleksaNott A May 14, 2017, 7:25 p.m. OK MS C# TESTS 168 62 512000 1500
26722278 og.kostya A April 28, 2017, 3:14 p.m. OK MS C# TESTS 168 62 9113600 1500
26744143 artsin666 A April 29, 2017, 9:11 a.m. OK MS C# TESTS 168 62 9318400 1500
33154124 den.egorychev A Dec. 12, 2017, 12:05 p.m. OK MS C# TESTS 168 62 9830400 1500
26724908 lionvs13 A April 28, 2017, 3:39 p.m. OK MS C# TESTS 168 62 11878400 1500
26799952 fr0st A May 2, 2017, 10:16 a.m. OK MS C# TESTS 168 92 12083200 1500
26752614 Olga333 A April 29, 2017, 4:35 p.m. OK MS C# TESTS 168 93 9113600 1500
26899927 Nathan1 A May 6, 2017, 11:28 a.m. OK MS C++ TESTS 168 15 0 1500
27842873 kapany3 A June 17, 2017, 9:39 a.m. OK MS C++ TESTS 168 15 0 1500
26900608 GJA A May 6, 2017, 12:05 p.m. OK MS C++ TESTS 168 15 102400 1500
27542996 TadijaSebez A June 3, 2017, 12:10 p.m. OK MS C++ TESTS 168 15 204800 1500
27451998 nemchinova_ea A May 30, 2017, 4:19 p.m. OK MS C++ TESTS 168 15 204800 1500
26979983 unun A May 9, 2017, 5:19 p.m. OK MS C++ TESTS 168 15 204800 1500
26910118 KobetheGOAT A May 6, 2017, 8:46 p.m. OK MS C++ TESTS 168 15 204800 1500
27598560 bronnikova18 A June 5, 2017, 6:29 p.m. OK MS C++ TESTS 168 15 204800 1500
26895259 shijie789 A May 6, 2017, 7:17 a.m. OK MS C++ TESTS 168 15 204800 1500
26907136 maria_solodova A May 6, 2017, 5:42 p.m. OK MS C++ TESTS 168 15 204800 1500
57173913 ZSTU-2018329621261 A July 17, 2019, 4:41 a.m. OK MS C++ 2017 TESTS 168 31 102400 1500
64612621 vjudge4 A Nov. 10, 2019, 2:44 a.m. OK MS C++ 2017 TESTS 168 31 102400 1500
65485181 vjudge5 A Nov. 21, 2019, 1:06 p.m. OK MS C++ 2017 TESTS 168 46 102400 1500
65485376 ZA139 A Nov. 21, 2019, 1:10 p.m. OK MS C++ 2017 TESTS 168 46 102400 1500
26795510 eduardoxfurtado A May 2, 2017, 3:34 a.m. OK PHP TESTS 168 46 6041600 1500
26783207 mayakin A May 1, 2017, 10:08 a.m. OK PHP TESTS 168 46 6041600 1500
27119856 andreamaf A May 15, 2017, 11:02 a.m. OK PyPy 2 TESTS 168 77 102400 1500
29812010 m7mdbadawy A Aug. 26, 2017, 5:43 p.m. OK PyPy 2 TESTS 168 93 102400 1500
40755180 aeternalis1 A July 25, 2018, 9:25 p.m. OK PyPy 2 TESTS 168 156 204800 1500
26724178 Naoki_M A April 28, 2017, 3:32 p.m. OK PyPy 3 TESTS 168 109 23859200 1500
55288135 darkkcyan A June 8, 2019, 6:15 a.m. OK PyPy 3 TESTS 168 140 307200 1500
26722415 SirNickolas A April 28, 2017, 3:15 p.m. OK PyPy 3 TESTS 168 140 23449600 1500
59997809 kopok2 A Sept. 4, 2019, 9:58 a.m. OK PyPy 3 TESTS 168 155 1638400 1500
59740363 frankyao47 A Aug. 30, 2019, 3:40 p.m. OK PyPy 3 TESTS 168 171 1433600 1500
55845435 gaurav17050 A June 20, 2019, 8:56 p.m. OK PyPy 3 TESTS 168 171 3686400 1500
54569939 artifexbm A May 24, 2019, 6:41 p.m. OK PyPy 3 TESTS 168 249 2969600 1500
26753653 xarshila_ A April 29, 2017, 5:41 p.m. OK PyPy 3 TESTS 168 249 26828800 1500
26980105 aniket3167 A May 9, 2017, 5:27 p.m. OK Python 2 TESTS 168 61 102400 1500
27463479 Exodia A May 31, 2017, 9:47 a.m. OK Python 2 TESTS 168 62 102400 1500
27421765 Ostkaka A May 29, 2017, 1:42 a.m. OK Python 2 TESTS 168 62 102400 1500
27367781 mithi100 A May 27, 2017, 5:56 a.m. OK Python 2 TESTS 168 62 102400 1500
27341012 kimbbakar A May 25, 2017, 4:30 p.m. OK Python 2 TESTS 168 62 102400 1500
27115252 nealzane A May 15, 2017, 4:03 a.m. OK Python 2 TESTS 168 62 102400 1500
26869596 DaviHenrique A May 5, 2017, 12:43 a.m. OK Python 2 TESTS 168 62 102400 1500
26830964 franckmy A May 4, 2017, 8:53 a.m. OK Python 2 TESTS 168 62 102400 1500
33700867 ytz123 A Dec. 28, 2017, 5:05 a.m. OK Python 2 TESTS 168 62 4608000 1500
28375027 noctisdark A July 8, 2017, 6:52 p.m. OK Python 2 TESTS 168 62 4710400 1500
27275998 SkyDec A May 22, 2017, 2:32 a.m. OK Python 3 TESTS 168 62 0 1500
27275969 SkyDec A May 22, 2017, 2:29 a.m. OK Python 3 TESTS 168 62 0 1500
27402606 Bumazhka A May 28, 2017, 7:18 a.m. OK Python 3 TESTS 168 62 102400 1500
27168428 hpjam A May 16, 2017, 8:31 p.m. OK Python 3 TESTS 168 62 102400 1500
26916921 nutorbitx A May 7, 2017, 6:09 a.m. OK Python 3 TESTS 168 62 102400 1500
26831644 xionix A May 4, 2017, 9:46 a.m. OK Python 3 TESTS 168 62 102400 1500
27118137 jdh A May 15, 2017, 8:55 a.m. OK Python 3 TESTS 168 62 307200 1500
26871512 Bumblefo A May 5, 2017, 3:24 a.m. OK Python 3 TESTS 168 62 307200 1500
26796297 0w1 A May 2, 2017, 4:54 a.m. OK Python 3 TESTS 168 62 5529600 1500
26775991 orailly A April 30, 2017, 10:47 p.m. OK Python 3 TESTS 168 62 5529600 1500
26973273 cielavenir A May 9, 2017, 12:09 p.m. OK Ruby TESTS 168 93 204800 1500

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