Codeforces Round 818 (Div. 2)

Solutions are presented as using the least memory and the fastest execution time. It also takes the top 10 most recent solutions from each language. If you want to limit to a specific index, click the "Solved" button and go to that problem.

ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
1717 Codeforces Round 818 (Div. 2) FINISHED False 7200 75137063 Sept. 2, 2022, 2:35 p.m.

Problems

Solved$
Index
Name
Type
Tags
Community Tag
Rating
( 19691 ) A Madoka and Strange Thoughts PROGRAMMING math number theory #combinatorics#C. Lucky Numbers 800

B"Madoka is a very strange girl, and therefore she suddenly wondered how many pairs of integers (a, b) exist, where 1 <= q a, b <= q n , for which frac{ operatorname{lcm}(a, b)}{ operatorname{gcd}(a, b)} <= q 3 . In this problem, operatorname{gcd}(a, b) denotes the greatest common divisor of the numbers a and b , and operatorname{lcm}(a, b) denotes the smallest common multiple of the numbers a and b . The input consists of multiple test cases. The first line contains a single integer t ( 1 <= t <= 10^4 ) -- the number of test cases. Description of the test cases follows. The first and the only line of each test case contains the integer n ( 1 <= n <= 10^8 ). For each test case output a single integer -- the number of pairs of integers satisfying the condition. For n = 1 there is exactly one pair of numbers -- (1, 1) and it fits. For n = 2 , there are only 4 pairs -- (1, 1) , (1, 2) , (2, 1) , (2, 2) and they all fit. For n = 3 , all 9 pair are suitable, except (2, 3) and (3, 2) , since their operatorname{lcm} is 6 , and operatorname{gcd} is 1 , which doesn't fit the condition. "...

Tutorials

Codeforces Round #818 (Div. 2) Editorial.

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
170642164 Quadrendeed A Sept. 2, 2022, 4:23 p.m. OK C# 10 TESTS 2 62 716800 800
170685821 singhkrishnajsr143 A Sept. 3, 2022, 3:01 a.m. OK C# 10 TESTS 3 77 614400 800
170684597 PhamLeHaAn A Sept. 3, 2022, 2:39 a.m. OK Clang++17 Diagnostics TESTS 3 93 102400 800
170686015 ShobhitKr_3 A Sept. 3, 2022, 3:04 a.m. OK Clang++20 Diagnostics TESTS 3 93 0 800
170675255 ksnitc25 A Sept. 2, 2022, 10:49 p.m. OK Clang++20 Diagnostics TESTS 2 140 0 800
170651296 eastnman A Sept. 2, 2022, 5:04 p.m. OK FPC TESTS 2 31 204800 800
170654313 DarkWillow A Sept. 2, 2022, 5:29 p.m. OK GNU C11 TESTS 2 15 0 800
170654007 ichi_kd A Sept. 2, 2022, 5:26 p.m. OK GNU C11 TESTS 2 31 0 800
170684488 eswar_13 A Sept. 3, 2022, 2:37 a.m. OK GNU C11 TESTS 3 46 0 800
170697008 morodmiya21 A Sept. 3, 2022, 5:56 a.m. OK GNU C11 TESTS 3 46 0 800
170648076 kumarsaurav3575 A Sept. 2, 2022, 4:47 p.m. OK GNU C11 TESTS 2 46 0 800
170651893 exhasan A Sept. 2, 2022, 5:09 p.m. OK GNU C11 TESTS 2 46 0 800
170667565 namanpahwa20 A Sept. 2, 2022, 8:07 p.m. OK GNU C11 TESTS 2 46 0 800
170658111 abdullah__92 A Sept. 2, 2022, 6:06 p.m. OK GNU C11 TESTS 2 61 0 800
170662197 niloy789 A Sept. 2, 2022, 6:53 p.m. OK GNU C11 TESTS 2 62 0 800
170686455 BOOGXOAXCA A Sept. 3, 2022, 3:12 a.m. OK GNU C11 TESTS 3 202 200396800 800
170691638 superzhl A Sept. 3, 2022, 4:45 a.m. OK GNU C++14 TESTS 3 0 0 800
170690005 sahibsingh139 A Sept. 3, 2022, 4:18 a.m. OK GNU C++14 TESTS 3 0 0 800
170689648 shenlongwoaini A Sept. 3, 2022, 4:12 a.m. OK GNU C++14 TESTS 3 0 0 800
170686065 duoluoluo A Sept. 3, 2022, 3:05 a.m. OK GNU C++14 TESTS 3 0 0 800
170684090 tybbs A Sept. 3, 2022, 2:29 a.m. OK GNU C++14 TESTS 3 0 0 800
170682980 flashtester A Sept. 3, 2022, 2:06 a.m. OK GNU C++14 TESTS 3 0 0 800
170678371 LzjNotFound A Sept. 3, 2022, 12:07 a.m. OK GNU C++14 TESTS 3 0 0 800
170696546 akie.c A Sept. 3, 2022, 5:50 a.m. OK GNU C++14 TESTS 3 0 0 800
170696284 practicetowin A Sept. 3, 2022, 5:47 a.m. OK GNU C++14 TESTS 3 0 0 800
170694452 aditya_pratap A Sept. 3, 2022, 5:23 a.m. OK GNU C++14 TESTS 3 0 0 800
170687710 velpro. A Sept. 3, 2022, 3:33 a.m. OK GNU C++17 TESTS 3 0 0 800
170687821 govindyadav2058 A Sept. 3, 2022, 3:35 a.m. OK GNU C++17 TESTS 3 0 0 800
170688237 LLLVTA A Sept. 3, 2022, 3:45 a.m. OK GNU C++17 TESTS 3 0 0 800
170688651 _BEKZAT_ A Sept. 3, 2022, 3:53 a.m. OK GNU C++17 TESTS 3 0 0 800
170689079 2016153230 A Sept. 3, 2022, 4:02 a.m. OK GNU C++17 TESTS 3 0 0 800
170690040 Yogi_123 A Sept. 3, 2022, 4:18 a.m. OK GNU C++17 TESTS 3 0 0 800
170695865 sokian A Sept. 3, 2022, 5:41 a.m. OK GNU C++17 TESTS 3 0 0 800
170684219 KoryuKory A Sept. 3, 2022, 2:32 a.m. OK GNU C++17 TESTS 3 0 0 800
170680372 PoptartBob A Sept. 3, 2022, 1:03 a.m. OK GNU C++17 TESTS 3 0 0 800
170679399 Tesla_Nicola A Sept. 3, 2022, 12:35 a.m. OK GNU C++17 TESTS 3 0 0 800
170682809 mQfZ A Sept. 3, 2022, 2:02 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170696171 rookie174 A Sept. 3, 2022, 5:45 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170695047 Time_JYF A Sept. 3, 2022, 5:31 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170689272 Eter.nal A Sept. 3, 2022, 4:05 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170688718 Ufimia A Sept. 3, 2022, 3:54 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170686712 kumarnimit0316 A Sept. 3, 2022, 3:16 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170685891 BBBBAO A Sept. 3, 2022, 3:02 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170685573 osamaBelal A Sept. 3, 2022, 2:57 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170682431 iprom A Sept. 3, 2022, 1:54 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170682246 RohitRKS A Sept. 3, 2022, 1:50 a.m. OK GNU C++17 (64) TESTS 3 0 0 800
170693536 wonderful_trip A Sept. 3, 2022, 5:11 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170693774 BibarysK A Sept. 3, 2022, 5:15 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170694052 _Apurbo_ A Sept. 3, 2022, 5:18 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170694319 sp_0510 A Sept. 3, 2022, 5:21 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170694445 Dinh_Quang_Huy A Sept. 3, 2022, 5:23 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170694458 Shivendra0510 A Sept. 3, 2022, 5:23 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170694562 verma_2000 A Sept. 3, 2022, 5:24 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170695929 himanshu222 A Sept. 3, 2022, 5:42 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170696036 fuxianyang Dog_food_is_me A Sept. 3, 2022, 5:44 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170697184 UtTaRaN A Sept. 3, 2022, 5:58 a.m. OK GNU C++20 (64) TESTS 3 0 0 800
170658971 koqo A Sept. 2, 2022, 6:15 p.m. OK Go TESTS 2 31 204800 800
170697246 sf14t A Sept. 3, 2022, 5:59 a.m. OK Java 11 TESTS 3 155 0 800
170679464 satyaa_78 A Sept. 3, 2022, 12:37 a.m. OK Java 11 TESTS 3 155 0 800
170648384 no_pes A Sept. 2, 2022, 4:47 p.m. OK Java 11 TESTS 2 155 0 800
170653712 samitdas03 A Sept. 2, 2022, 5:24 p.m. OK Java 11 TESTS 2 156 0 800
170655230 dpsn743 A Sept. 2, 2022, 5:38 p.m. OK Java 11 TESTS 2 170 0 800
170696074 __Serendipity A Sept. 3, 2022, 5:44 a.m. OK Java 11 TESTS 3 171 0 800
170645038 Spidey2182 A Sept. 2, 2022, 4:30 p.m. OK Java 11 TESTS 2 171 0 800
170645950 Casey_1412109 A Sept. 2, 2022, 4:32 p.m. OK Java 11 TESTS 2 217 0 800
170658386 AyushS_cg170 A Sept. 2, 2022, 6:09 p.m. OK Java 11 TESTS 2 218 0 800
170695553 x21svage A Sept. 3, 2022, 5:37 a.m. OK Java 11 TESTS 3 233 0 800
170655219 ivanshubin A Sept. 2, 2022, 5:38 p.m. OK Java 17 TESTS 2 139 0 800
170660873 YO07 A Sept. 2, 2022, 6:37 p.m. OK Java 17 TESTS 2 140 0 800
170640208 shubhanshu_jha14 A Sept. 2, 2022, 4:18 p.m. OK Java 17 TESTS 2 155 0 800
170688712 maverick_1729 A Sept. 3, 2022, 3:54 a.m. OK Java 17 TESTS 3 171 40960000 800
170656753 Ali04 A Sept. 2, 2022, 5:53 p.m. OK Java 17 TESTS 2 202 0 800
170655858 Abhishek_821023 A Sept. 2, 2022, 5:44 p.m. OK Java 17 TESTS 2 217 204800 800
170647051 20501A05H3 A Sept. 2, 2022, 4:34 p.m. OK Java 17 TESTS 2 233 0 800
170644336 jagajeet-puttaa A Sept. 2, 2022, 4:28 p.m. OK Java 17 TESTS 2 233 0 800
170656307 ac9117033 A Sept. 2, 2022, 5:48 p.m. OK Java 17 TESTS 2 265 0 800
170674835 leonlian A Sept. 2, 2022, 10:37 p.m. OK Java 8 TESTS 2 62 0 800
170674047 Sussykin A Sept. 2, 2022, 10:15 p.m. OK Java 8 TESTS 2 77 0 800
170652166 AFouad204 A Sept. 2, 2022, 5:11 p.m. OK Java 8 TESTS 2 77 0 800
170674406 ganesh_6 A Sept. 2, 2022, 10:25 p.m. OK Java 8 TESTS 2 78 0 800
170668791 Melsonic A Sept. 2, 2022, 8:26 p.m. OK Java 8 TESTS 2 78 0 800
170654092 Lyashenko A Sept. 2, 2022, 5:27 p.m. OK Java 8 TESTS 2 78 0 800
170669369 tumsenahoga A Sept. 2, 2022, 8:35 p.m. OK Java 8 TESTS 2 92 0 800
170683055 anshulchou_123 A Sept. 3, 2022, 2:08 a.m. OK Java 8 TESTS 3 93 0 800
170662829 Koka A Sept. 2, 2022, 7:01 p.m. OK Java 8 TESTS 2 93 0 800
170651092 karamkontar A Sept. 2, 2022, 5:03 p.m. OK Java 8 TESTS 2 93 0 800
170650345 _gyunghoe_ A Sept. 2, 2022, 4:58 p.m. OK Kotlin 1.6 TESTS 2 248 0 800
170639486 NooB_VansH A Sept. 2, 2022, 4:16 p.m. OK MS C++ 2017 TESTS 2 0 0 800
170652150 MohammedSB A Sept. 2, 2022, 5:11 p.m. OK MS C++ 2017 TESTS 2 30 0 800
170692549 KinnGiFe A Sept. 3, 2022, 4:58 a.m. OK MS C++ 2017 TESTS 3 31 0 800
170641532 rviswanadhapalli A Sept. 2, 2022, 4:21 p.m. OK MS C++ 2017 TESTS 2 31 0 800
170689170 6ziv A Sept. 3, 2022, 4:03 a.m. OK MS C++ 2017 TESTS 3 31 2355200 800
170692554 adesh123 A Sept. 3, 2022, 4:58 a.m. OK MS C++ 2017 TESTS 3 46 0 800
170685784 wawawawa1 A Sept. 3, 2022, 3 a.m. OK MS C++ 2017 TESTS 3 46 0 800
170668226 gkukanov A Sept. 2, 2022, 8:17 p.m. OK MS C++ 2017 TESTS 2 46 0 800
170664874 MoAdelEzz A Sept. 2, 2022, 7:27 p.m. OK MS C++ 2017 TESTS 2 46 0 800
170656526 Rhnvrma A Sept. 2, 2022, 5:50 p.m. OK MS C++ 2017 TESTS 2 46 0 800
170649955 784 A Sept. 2, 2022, 4:55 p.m. OK Perl TESTS 2 15 921600 800
170648182 1_2_3_4_5_9 A Sept. 2, 2022, 4:47 p.m. OK PyPy 2 TESTS 2 124 6451200 800
170665785 titia A Sept. 2, 2022, 7:39 p.m. OK PyPy 3 TESTS 2 93 3788800 800
170661986 zxcuser2 A Sept. 2, 2022, 6:50 p.m. OK PyPy 3 TESTS 2 108 4096000 800
170679418 Jvaeyhcd A Sept. 3, 2022, 12:35 a.m. OK PyPy 3 TESTS 3 108 4198400 800
170689788 kraanzu A Sept. 3, 2022, 4:14 a.m. OK PyPy 3 TESTS 3 140 68403200 800
170641238 one_moment A Sept. 2, 2022, 4:21 p.m. OK PyPy 3 TESTS 2 218 5017600 800
170649566 akshat11 A Sept. 2, 2022, 4:53 p.m. OK PyPy 3 TESTS 2 218 5120000 800
170689115 WalrusRamen21 A Sept. 3, 2022, 4:03 a.m. OK PyPy 3 TESTS 3 233 5120000 800
170664847 yashsarda2002 A Sept. 2, 2022, 7:27 p.m. OK PyPy 3 TESTS 2 248 4812800 800
170662103 divyamkakkar24 A Sept. 2, 2022, 6:52 p.m. OK PyPy 3 TESTS 2 248 5324800 800
170665019 NapoleonB A Sept. 2, 2022, 7:29 p.m. OK PyPy 3 TESTS 2 249 5324800 800
170661526 Mustafa_arahim A Sept. 2, 2022, 6:45 p.m. OK PyPy 3-64 TESTS 2 62 4710400 800
170653552 kwin A Sept. 2, 2022, 5:23 p.m. OK PyPy 3-64 TESTS 2 62 5222400 800
170680029 ankan2526 A Sept. 3, 2022, 12:53 a.m. OK PyPy 3-64 TESTS 3 62 135270400 800
170658436 griffindor A Sept. 2, 2022, 6:09 p.m. OK PyPy 3-64 TESTS 2 77 3788800 800
170681710 InariInDream A Sept. 3, 2022, 1:38 a.m. OK PyPy 3-64 TESTS 3 77 3891200 800
170693602 nealzane A Sept. 3, 2022, 5:12 a.m. OK PyPy 3-64 TESTS 3 77 5017600 800
170651475 aniketabhiraj2004 A Sept. 2, 2022, 5:06 p.m. OK PyPy 3-64 TESTS 2 77 5222400 800
170648858 Mohamed_yousef2024 A Sept. 2, 2022, 4:49 p.m. OK PyPy 3-64 TESTS 2 77 5222400 800
170641944 jgs03177 A Sept. 2, 2022, 4:22 p.m. OK PyPy 3-64 TESTS 2 77 5222400 800
170687393 keroru A Sept. 3, 2022, 3:28 a.m. OK PyPy 3-64 TESTS 3 77 6144000 800
170695079 Ibrahim-Elsayed A Sept. 3, 2022, 5:31 a.m. OK Python 3 TESTS 3 46 0 800
170640085 giuliomanuzzi A Sept. 2, 2022, 4:17 p.m. OK Python 3 TESTS 2 46 307200 800
170641148 Harry_yash A Sept. 2, 2022, 4:20 p.m. OK Python 3 TESTS 2 61 0 800
170646168 ayushkumarkeshri442 A Sept. 2, 2022, 4:33 p.m. OK Python 3 TESTS 2 77 0 800
170695522 Pars03 A Sept. 3, 2022, 5:37 a.m. OK Python 3 TESTS 3 77 409600 800
170650473 Block_Cipher A Sept. 2, 2022, 4:58 p.m. OK Python 3 TESTS 2 92 0 800
170649667 JIRAIYA_Sama A Sept. 2, 2022, 4:54 p.m. OK Python 3 TESTS 2 92 0 800
170644540 ruchika_sonagote A Sept. 2, 2022, 4:29 p.m. OK Python 3 TESTS 2 92 0 800
170644432 YaskevichMisha A Sept. 2, 2022, 4:29 p.m. OK Python 3 TESTS 2 92 0 800
170665242 WhiteHatPandit A Sept. 2, 2022, 7:32 p.m. OK Python 3 TESTS 2 93 0 800
170674592 Svlad_Cjelli A Sept. 2, 2022, 10:31 p.m. OK Rust 2021 TESTS 2 0 0 800
170670430 kena0ki A Sept. 2, 2022, 8:54 p.m. OK Rust 2021 TESTS 2 0 0 800
170679001 Spheniscine A Sept. 3, 2022, 12:25 a.m. OK Rust 2021 TESTS 3 15 102400 800

remove filters

Back to search problems