Problem Solutions

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Here we discuss the solutions of problems.

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Topic Posts Created Last post
Say-100 request 5 GeorgySerga
Jun 17 2016
Rodion (admin)
Mar 27 2024 07:43
Problem 6 Rounding in Python3 21 Freddie_Lavoie
Jul 10 2020
Rodion (admin)
Nov 24 2023 04:59
[Task#113] How to solve Ground Zero 8 Rodion (admin)
Aug 3 2014
robbin_b
Aug 8 2023 10:44
14 Modular calculator problem 6 makeMH
Aug 29 2018
Rodion (admin)
Jun 26 2023 06:05
Traveling Salesman Inverted 112 5 Andrey Chadin
Aug 20 2021
omsarmiento1953
Apr 7 2023 09:46
Median of three 4 mattdiflorio
Nov 21 2016
big madik
Apr 6 2023 12:31
Sequence of Squares (task 126) 4 ssvipl64
Nov 15 2014
jugarciaba
Mar 30 2023 16:21
fibonacci divisibility advanced problem 71 10 colin_mcnicholl
Jul 1 2019
omsarmiento1953
Mar 16 2023 21:17
Look and Say Binary 179 8 Vladimir_V
Jan 31 2016
mmartinezve
Mar 8 2023 03:05
46 Tic-Tac-Toe Problem statement 7 Cl3r1k
Dec 12 2016
zelevin
Feb 27 2023 06:47
[102] Travelling Salesman 10 anneenna
Apr 27 2020
omsarmiento1953
Feb 23 2023 06:19
Problem 85 sorting by Y and X 5 ecolog_veteran
Dec 2 2019
omsarmiento1953
Jan 11 2023 19:21
Cards Shuffling 5 Curio_Amigo
Oct 30 2020
zelevin
Oct 6 2022 13:48
How important is it to fully grasp a problem or concept before moving on? 7 andrewdanine
Oct 9 2020
Bob Fett
May 25 2022 09:16
Emirp primE2 Problem 157 question 4 Alexandr Milovantsev
Aug 29 2019
zelevin
Apr 4 2022 23:43
Problem 218 Rain Must Fall 9 douteigami
Apr 8 2021
TestUser
Feb 16 2022 16:25
[Task#241] Solution for Village Ways 9 gardengnome
Feb 9 2022
sam_bandara
Feb 11 2022 03:35
Problem 33 - Parity Control 7 Eddie_Hitler
Jan 19 2022
Eddie_Hitler
Jan 19 2022 14:52
I just needs some guidance please 3 Ivan Camilo Gamez
Jan 6 2022
Rodion (admin)
Jan 6 2022 08:15
Problem 22 - Two Printers 2 trodrigueza
Nov 28 2021
Rodion (admin)
Nov 29 2021 06:46
Problem 73 - hexagonal grid 6 andrewdanine
Sep 10 2021
Rodion (admin)
Sep 13 2021 17:06
[Task#220] 220 - Linearity 3 zexo
Sep 2 2021
zexo
Sep 10 2021 14:48
Question on Problem 27 - Sort with Indexes 2 Daniel Nie
Sep 1 2021
Rodion (admin)
Sep 1 2021 16:59
Question regarding Introducing Scheme (Problem 223) 4 D_madrev
Aug 19 2021
D_madrev
Aug 20 2021 00:12
[Task#231] Discussion of optimal array merge problem 3 qwerty
Aug 13 2021
qwerty
Aug 14 2021 17:12
[Task#61] Problem 61 - Prime Number Generator 2 louissheldon58
Jul 31 2021
qwerty
Aug 4 2021 16:01
Problem 146 Color Cubes 6 ABenedict
Jun 13 2021
ABenedict
Jun 22 2021 19:28
Problem 170 Binary Search in Array 3 qwerty
Jun 20 2021
Rodion (admin)
Jun 20 2021 20:11
Task 56 Life is Simple 4 Artyom Tsatinyan
Apr 24 2021
Rodion (admin)
Apr 27 2021 07:48
In Problem 14 the intermidiate results are going above long range and producing abnormal results 4 Ujjwal Gupta
Apr 6 2021
Rodion (admin)
Apr 6 2021 20:21
Problem 229 Burrows-Wheeler Transform 3 gardengnome
Mar 29 2021
gardengnome
Mar 29 2021 20:55
Problem 22 4 MAE_S_TRO
Mar 22 2021
MAE_S_TRO
Mar 28 2021 10:39
[Task#226] Problem 226 - Multiplicative Persistence 8 sontran
Mar 13 2021
zelevin
Mar 17 2021 23:49
[Task#227] Memory limit? 2 sontran
Mar 15 2021
Rodion (admin)
Mar 15 2021 08:41
[Task#225] Problem 225 Hamurabi 3 gardengnome
Mar 10 2021
Rodion (admin)
Mar 11 2021 10:45
Problem 183 Connect Four 3 gardengnome
Feb 28 2021
gardengnome
Feb 28 2021 14:53
Problems 187-189 10 gardengnome
Feb 25 2021
Rodion (admin)
Feb 26 2021 11:02
Task 19 - processes only half of data 3 ukolem_no
Feb 21 2021
ukolem_no
Feb 22 2021 15:07
[Task#56] What is wrong with my algorithm - Life is Simple 7 Arman Cam
Jan 7 2021
Arman Cam
Jan 8 2021 13:25
Code Guesser 2 Curio_Amigo
Nov 26 2020
qwerty
Nov 27 2020 22:30
Color Cubes Problem 146 2 Igor Shapovalov
Nov 16 2020
Igor Shapovalov
Nov 16 2020 15:04
Lucky Tickets 109 6 Igor Shapovalov
Nov 13 2020
Igor Shapovalov
Nov 14 2020 22:14
Safe Landing Problem 165 2 Igor Shapovalov
Nov 13 2020
Igor Shapovalov
Nov 13 2020 11:12
Checker Problem Base-32 Encoding task 206 5 Igor Shapovalov
Nov 12 2020
qwerty
Nov 12 2020 07:40
Anagrams Problem 15 Curio_Amigo
Nov 4 2020
Curio_Amigo
Nov 9 2020 00:13
[Task 152] Can anybody check me for mistakes? 3 Andrey Chadin
Nov 4 2020
Andrey Chadin
Nov 5 2020 00:40
Modular Calculator in java 2 Azizbek_D
Nov 3 2020
Rodion (admin)
Nov 4 2020 07:57
[Task#27] Problem 27 2 jans2326
Nov 1 2020
Alexandr Milovantsev
Nov 3 2020 06:32
[Task 188] Having a bit of a problem with a hyperlink 6 shi-anli
Oct 26 2020
shi-anli
Oct 26 2020 20:43
Problem 176 Say 100 4 TimeToMoveOn
Oct 20 2020
qwerty
Oct 22 2020 20:00
Crossing the Road 100 1 Igor Shapovalov
Oct 20 2020
Igor Shapovalov
Oct 20 2020 18:03
Uphill Shooting 1 Igor Shapovalov
Oct 20 2020
Igor Shapovalov
Oct 20 2020 12:52
Task 156 Luhn Algorithm 1 crydolphin666
Oct 19 2020
crydolphin666
Oct 19 2020 18:53
[Task#183] Connect 4 - How good is the server? 2 mookbeezle
Oct 13 2020
Rodion (admin)
Oct 19 2020 08:17
Binary Heap Problem 92 2 Igor Shapovalov
Oct 18 2020
Igor Shapovalov
Oct 18 2020 20:37
164 Page Rank - or my small Rankor 1 Andrey Chadin
Oct 18 2020
Andrey Chadin
Oct 18 2020 00:19
Problem 78 Bezier Curves 3 Igor Shapovalov
Oct 15 2020
Alexandr Milovantsev
Oct 16 2020 11:33
[Task#39] Is this a bad and inefficient way of solving the problem? 5 andrewdanine
Oct 10 2020
andrewdanine
Oct 13 2020 05:25
Problem 66 Caesar Cipher Cracker 2 Ahmad Boboev
May 2 2017
rifakamellia2901
Oct 10 2020 03:34
Help with Rounding (task 6) 13 alidarakhshaan
Oct 24 2014
Prabhat_SY
Oct 9 2020 11:42
[Task#6] Is this a convoluted way of solving this problem? Task 6 - Rounding 2 andrewdanine
Oct 9 2020
crydolphin666
Oct 9 2020 05:36
[Task#61] Problem 61 Prime Numbers Generation 8 crydolphin666
Oct 2 2020
Alexandr Milovantsev
Oct 6 2020 04:48
Problem 6 - Problem with some rounded numbers some are ok others dont 2 joisaac_
Oct 5 2020
Alexandr Milovantsev
Oct 6 2020 02:53
problem 140 Catalan numbers? 2 Andrey Chadin
Sep 23 2020
Rodion (admin)
Sep 25 2020 15:32
Problem 35 - Savings Calculator 5 Curio_Amigo
Sep 1 2020
Curio_Amigo
Sep 3 2020 05:51
Gradient Calculation 16 Leonid_Manieiev
Jul 9 2015
Dead Forest Foundation
Aug 12 2020 11:26
Starving Priority Queue 3 Y_VICTORY
Aug 3 2020
Y_VICTORY
Aug 4 2020 02:34
Problem 40 Paths in the Grid - No Output? 7 huskeratsouth
Mar 31 2015
MULTIVAC
Jul 23 2020 15:11
Weighted sum of digits 11 sleepijs
Jan 16 2016
Freddie_Lavoie
Jul 18 2020 21:00
Error in problem description for Problem 39(Share Price Volatility) 2 Amit Saha
Jul 13 2020
Rodion (admin)
Jul 14 2020 11:51
Tree height measurement Task 171 15 aditya_tomar
Jun 30 2020
aditya_tomar
Jul 1 2020 12:52
Minor error in description of Problem 141 (Sliding Window Search) 3 jalksdfjasfdl
Jun 25 2020
Rodion (admin)
Jun 27 2020 06:49
[Task 6] - Rounding - Please Help 4 daxattwood.uk
Jun 17 2020
deigumnov
Jun 18 2020 09:51
17 my program produces the correct result and the compiler on the site does not skip 2 Popovich Arseny Igorevich
Jun 7 2020
sontran
Jun 7 2020 21:00
help me please the code works correctly but the site does not compile 2 Popovich Arseny Igorevich
May 28 2020
Rodion (admin)
May 31 2020 06:19
Hello everyone Task number 16 Help 2 Popovich Arseny Igorevich
May 28 2020
Prosthetic Conscience
May 28 2020 13:22
[Task#118] Single-Player Maxit 2 OldProgrammer
Mar 20 2016
slayfer1112
May 22 2020 20:36
Problem 11 help me pleas Java 1 Popovich Arseny Igorevich
May 22 2020
Popovich Arseny Igorevich
May 22 2020 18:52
[Task#131] [131] Check Efficiency 1 anneenna
May 6 2020
anneenna
May 6 2020 10:03
Problem 10 Linear Function checker problem 3 Suman Dutta
May 4 2020
Suman Dutta
May 6 2020 09:52
Task 122 Quicksort 2 anneenna
May 5 2020
anneenna
May 5 2020 07:59
Dynamic Web Page 6 Y_VICTORY
Apr 27 2020
Quandray
May 2 2020 06:21
[Task#51] [Problem 51] Dungeons and Dragon Dice 3 tonychamberlain
Jan 30 2017
The Black Knight
Apr 28 2020 11:16
Problem 69 - Fibo divisibility 5 atharva p
Mar 30 2020
atharva p
Apr 20 2020 06:28
Problem 90 Lexicographic Permutations 3 anneenna
Apr 15 2020
anneenna
Apr 18 2020 12:57
[Task#169] Automated Landing answer precision 5 Moff
Oct 28 2014
Prosthetic Conscience
Apr 17 2020 12:56
Problem 61 Prime Numbers Generation time 4 huakun99
Feb 22 2020
sirpetethegreat
Apr 13 2020 06:38
Problem 33 question about solution 3 shatseli
Apr 5 2020
Rodion (admin)
Apr 10 2020 03:09
Problem 137 Shannon-Fano coding 14 kostis_k
Mar 14 2020
kostis_k
Apr 3 2020 22:35
Task 209 Suffix Array Advanced 5 Dead Forest Foundation
Apr 2 2020
Rodion (admin)
Apr 3 2020 09:13
31 - Rotate string 3 shatseli
Mar 31 2020
shatseli
Mar 31 2020 18:50
Problem 6 How to round correctly 2 SergioAlon
Mar 30 2020
Rodion (admin)
Mar 31 2020 04:15
problem 35 - Savings Calculator (for Rodion Gorkovenko) 7 BukChoiWarrior
Dec 22 2019
Philosophical-Zombie
Mar 16 2020 22:49
Problem 99 6 Polyakov Alexandr
Feb 19 2020
Rodion (admin)
Feb 21 2020 18:32
Problem 51 Dungeons and Dragons hints 2 huakun99
Feb 17 2020
Rodion (admin)
Feb 17 2020 15:46
Problem 24 ( pseudo ) Random Generator 3 shatseli
Feb 14 2020
Rodion (admin)
Feb 17 2020 06:59
Something goes wrong with Array Check Sum Calculation ( java) in problem 23 5 shatseli
Feb 13 2020
shatseli
Feb 14 2020 14:11
[Task#159] Hard Life - Off by 4 error? 2 Vadim Pelyushenko
Feb 13 2020
Rodion (admin)
Feb 13 2020 06:13
Some strange behavior ( unlimited response time ) with processing tasks 18 and 19 4 shatseli
Feb 1 2020
Rodion (admin)
Feb 4 2020 20:51
Problem 37 (Mortgage Calculator) no single solution? 6 ahmose231
Jan 10 2019
Rodion (admin)
Feb 4 2020 06:53
Problem 176 Say 100 - error No token found 7 Dead Forest Foundation
Jan 29 2020
Dead Forest Foundation
Jan 30 2020 08:18
Problem 56 Life is Simple 8 s.ishmuratov
Oct 1 2019
Dead Forest Foundation
Jan 29 2020 05:46
[Task#5] Problem 5 etc Java Input of Data 3 suganmytry
Jan 23 2020
suganmytry
Jan 25 2020 23:19
Solution 15 - Dear Brothers and Sisters pls give your opinions critical note on my code 3 shatseli
Jan 19 2020
shatseli
Jan 22 2020 08:21
Solution for prob 14 Modular calculator It strictly seems me that there is a bug on the server 7 shatseli
Jan 16 2020
shatseli
Jan 19 2020 13:45
Bit Count confusion (task 81) 16 bpzzt_br
Nov 6 2014
omar_batistuta
Jan 12 2020 22:12
SwappingError with Luhn Algorithm 2 SkullxLuv
Jan 7 2020
Rodion (admin)
Jan 10 2020 07:53
if its triangle javascript whats wrong 2 not44kcal
Nov 17 2019
Rodion (admin)
Jan 3 2020 13:19
Problem 33 Getting boxes 2 usherjosh
Dec 6 2019
Rodion (admin)
Jan 3 2020 12:51
[Task#31] Can someone explain me the hard solution to Rotate String? 2 Goodwin Lu
Dec 12 2019
vimal_singh
Dec 14 2019 03:32
task 23 Bubble in Array 4 Sergey Afonin
Feb 15 2016
Dead Forest Foundation
Dec 13 2019 11:27
159 Hard Life confirmation 9 Eldzik
Oct 5 2014
Alexander Denisov
Nov 21 2019 09:58
Problem 15 Maximum of Array Output 2 fasciation
Nov 12 2019
Quandray
Nov 13 2019 07:41
Hamming Codes 4 Moff
Sep 16 2014
MULTIVAC
Nov 6 2019 23:53
[Task#81] Pls walk me through the provided solution for task 81 1 ryancurtisacosta
Oct 22 2019
ryancurtisacosta
Oct 22 2019 15:44
QuickSort Problem 122 Sorts fine but answer does not match solution 1 vapourfire
Oct 21 2019
vapourfire
Oct 21 2019 10:47
Problem 145 in JavaScript 4 grey2010
Oct 2 2019
grey2010
Oct 17 2019 18:48
Problem 163 Colliding Balls 11 Quandray
Feb 8 2015
ctraversa
Oct 17 2019 11:36
Problem number 6 rounding in c language 2 ta.shrivastava
Oct 16 2019
Quandray
Oct 17 2019 06:37
Dynamic Web Page 3 Vladimir_V
Jan 7 2016
s.ishmuratov
Oct 11 2019 13:33
are interactive problems working again 7 mooninvader
Sep 30 2019
mooninvader
Oct 2 2019 21:19
Problem 15 Max Array - Results match expected but still wrong 3 BadMotivator
Nov 29 2015
tapukist1990gamer
Sep 26 2019 02:06
[Task#103] Easter Eggs 7 Matthew Cole
Jan 20 2015
Wojciech Morawiec
Sep 1 2019 07:11
possible bug in checker for problem 060 Sweet Harvest 2 Alexandr Milovantsev
Aug 30 2019
Alexandr Milovantsev
Aug 30 2019 15:00
stream cipher breaking problem 132 4 colin_mcnicholl
Jul 23 2019
colin_mcnicholl
Aug 1 2019 09:10
suffix array advanced problem 209 10 colin_mcnicholl
Jul 11 2019
colin_mcnicholl
Jul 24 2019 09:25
[Task#206] Problem 206 padding 3 zwkiler225
Jul 22 2019
zwkiler225
Jul 23 2019 20:36
Problem 145 What kind of an algorithm should we use 3 Arman Cam
Jul 3 2019
Arman Cam
Jul 4 2019 15:43
Huffman coding problem 138 8 colin_mcnicholl
Jun 20 2019
colin_mcnicholl
Jun 25 2019 10:32
Task 14 - Input problem with Python3 3 Gabriel Nunez Serna
Jun 13 2019
Gabriel Nunez Serna
Jun 14 2019 13:28
Problem 120 Selection Sort 3 Bill Hardwick
May 30 2019
Bill Hardwick
May 31 2019 08:03
task 188 Basics of HTML 3 Y_VICTORY
May 30 2019
Rodion (admin)
May 30 2019 09:55
code guesser problem 36 3 colin_mcnicholl
May 13 2019
colin_mcnicholl
May 14 2019 08:17
Problem 74 Clock Hands (Possible error in example) 4 ac1dloop
May 6 2019
Rodion (admin)
May 6 2019 13:03
graph generator problem 83 5 colin_mcnicholl
May 1 2019
colin_mcnicholl
May 4 2019 09:10
Error in 114 Gradient Descent for SLE 9 go_coder
Mar 13 2015
johnnycake
May 2 2019 01:36
Knights Tour Problem 107 6 kbobrov92
Apr 21 2019
Rodion (admin)
Apr 22 2019 11:12
Problem 120 Selection Sort 3 Shantanu Barik
Apr 16 2019
Shantanu Barik
Apr 16 2019 07:04
[Task 187] Static Web Page 2 Roman_Krysyaev
Apr 12 2019
Rodion (admin)
Apr 14 2019 14:43
Problem 34 Binary Search 23 hogarth45
Jan 20 2015
Rodion (admin)
Mar 29 2019 19:58
Problems 133 and 155 2 kbobrov92
Mar 21 2019
Rodion (admin)
Mar 21 2019 15:06
problem 22 7 Andris Laduzans
Mar 6 2019
Rodion (admin)
Mar 7 2019 21:32
Problem 19 What wrong with my code? (with code)(java)(javalangNullPointerException) 4 Pavel_Emelyanov
Mar 6 2019
Rodion (admin)
Mar 6 2019 17:06
Brainfuck problem 117 Divide by two 5 Menshikov Ivan
Mar 1 2019
Menshikov Ivan
Mar 1 2019 17:52
if and elif issue for modular calculator 5 ryancurtisacosta
Jan 15 2019
Rodion (admin)
Jan 16 2019 21:06
Problem 80 - Duel Chances 2 ahmose231
Jan 15 2019
Rodion (admin)
Jan 15 2019 18:28
Probably a problem in recursion 3 Snow_Owl
Jan 9 2019
Snow_Owl
Jan 10 2019 07:22
fFibonacci Divisibility Advanced(71) 2 dianaosorio66
Nov 29 2018
Rodion (admin)
Nov 29 2018 08:11
Fibonacci Divisibility (69) - long numbers 6 efesmirfis
Feb 1 2015
Vladimir Skvortsov
Oct 7 2018 11:04
c array rus 2 Broode_Den
Aug 7 2018
valerijj.gavrilvgoo
Sep 11 2018 09:00
Issues connecting to interactive problem server? 4 MissPython
Jul 13 2016
Hennes
Aug 10 2018 11:41
Problem 8 [Java] 2 MrChebik
Apr 3 2016
advikayya
Aug 3 2018 03:48
24 Neumanns Random Generator 3 PingPong
Jul 25 2018
PingPong
Jul 28 2018 17:53
[Task#105] convex polygon area solution 1 bananappp
Jun 24 2018
bananappp
Jun 24 2018 00:20
Problem 50 Palindrome 2 gpaneneva
Jun 21 2018
Quandray
Jun 22 2018 10:26
Interactive Problems (error 404) 3 kayoukou
Jun 6 2018
SavalusTEC
Jun 17 2018 20:44
Difficulty solving problem 23 bubble in array 4 guntherrose
Aug 13 2015
Gxz-NGU
Jun 14 2018 03:13
[Task83] Graph Generator 4 Cl3r1k
Mar 10 2017
vancea.vladimir
May 16 2018 19:06
[Problem 36] Code Guessser 12 Johni Limoni
Jan 20 2017
Jason Krasavage
Apr 5 2018 07:49
[Task#41] Question about reading through lines in text 3 Kevin J Wright
Feb 3 2018
Quandray
Feb 3 2018 08:08
Task 18 - Square Root 3 Miguel
Jan 23 2018
Miguel
Jan 23 2018 16:28
Problem 206 Base-32 Encoding 1 Dmitry_Kovalov
Jan 22 2018
Dmitry_Kovalov
Jan 22 2018 23:59
Median of 2 2 Colvanila
Dec 15 2017
Colvanila
Dec 15 2017 23:57
Neumanns Random Generator 8 Reschikov
Nov 19 2017
Reschikov
Nov 22 2017 12:22
[190] Query String Parameters 3 go_coder
Apr 4 2015
Quandray
Nov 7 2017 20:21
Problem 69 - Fibonacci Divisibility - are input values valid? 5 mr.scapegrace
Oct 27 2017
mr.scapegrace
Oct 30 2017 10:44
problem in submission task 147 Color Cubes Advanced 3 zipiavi4
Oct 20 2017
zipiavi4
Oct 20 2017 20:36
Problem 127 - Anagram 8 InXsense
Apr 3 2015
Quandray
Sep 28 2017 15:28
[C] Problem 67 Fibonacci sequence 5 chainsaw
Aug 2 2017
Quandray
Sep 28 2017 06:30
Problem 14 Modular Calculator 2 SlapstickMojo
Aug 31 2017
Quandray
Aug 31 2017 19:50
Problem 34 Binary search precision 7 SirTurtleton
Aug 18 2017
SirTurtleton
Aug 18 2017 15:32
Neumanns Random Generator 2 John
Aug 7 2017
Quandray
Aug 7 2017 07:52
Pairing Control problem 5 Michael Gnedkovskii
Aug 3 2017
Michael Gnedkovskii
Aug 3 2017 23:24
[45 Card Shuffler] Doesnt Random mean different results? 2 mattshu67
Jul 15 2017
mattshu67
Jul 15 2017 04:20
[Task#180] Is Simple Game of Sticks really simple? 6 Moff
Dec 6 2014
codeartisan
Jul 12 2017 22:18
Smoothing the weather - Java precision 3 wright_kevin
May 25 2017
BigAndyD
Jun 3 2017 09:18
[Problem 187] Static Web Page - No HTTPS 1 TheVadammt
Apr 30 2017
TheVadammt
Apr 30 2017 22:45
Arithmetic Progression some problems 3 OrkhanAZ
Mar 25 2017
tonychamberlain
Apr 3 2017 20:25
[Task#112] Travelling Salesman Inverted 2 OldProgrammer
Feb 19 2017
tonychamberlain
Apr 3 2017 20:15
Fibonacci positions (task 67) in JavaScript 11 Finchnixer
Aug 2 2015
Andriy Stepaniuk
Mar 24 2017 01:25
22 Two Printers 4 dimonos05psy
Feb 5 2017
dimonos05psy
Feb 6 2017 19:50
[Task#6] Problems with Rounding 4 lvcrft
Jan 28 2017
tonychamberlain
Jan 30 2017 14:13
Page Rank as Eigenvector 4 Vladimir_V
Jan 15 2016
tonychamberlain
Jan 30 2017 07:03
[Problem 131] Four Pics One Word 3 tonychamberlain
Jan 27 2017
tonychamberlain
Jan 28 2017 04:31
[Task#43] Dice Rolling 2 Andrew Yefanov
Jan 16 2017
tonychamberlain
Jan 24 2017 21:04
Luhn Algorithm need help 3 dlardashev
Jan 21 2017
dlardashev
Jan 21 2017 13:59
Share Price Volatility please help 2 dlardashev
Jan 16 2017
Quandray
Jan 16 2017 20:46
Parity Control 3 dlardashev
Jan 8 2017
dlardashev
Jan 8 2017 10:39
[Task#213] Micro-Life ranking system 8 Moff
Nov 11 2015
stanislav.zholnin
Jan 3 2017 21:12
[Task#20] Clumsy solution 2 argonprogram
Jan 3 2017
Quandray
Jan 3 2017 19:13
Modular Calculator 7 transingularity
Jun 30 2015
Quandray
Dec 22 2016 19:31
Problem 54 - Pythagorean Triples 3 yeskaybee
Dec 17 2016
yeskaybee
Dec 18 2016 20:40
Problem 117 Divide by Two 6 Valerii Reheda
Jun 29 2016
piotrkocik90
Dec 15 2016 17:37
[Task#212] How to calc the solution size 10 Moff
Oct 8 2015
Quandray
Dec 15 2016 07:58
A little problem with array checksums using PHP 3 Michal Gawel
Dec 9 2016
Michal Gawel
Dec 10 2016 08:51
basic html 2 dambrosi97
Nov 29 2016
Quandray
Nov 29 2016 13:56
[Task#21] Array Counters 3 mattdiflorio
Nov 25 2016
mattdiflorio
Nov 25 2016 17:23
Array CheckSum What is wrong? 8 OneMoreTime
Nov 8 2016
OneMoreTime
Nov 12 2016 00:20
Task 59 Bulls and Cows 3 Mbapathe
Nov 3 2016
Mbapathe
Nov 3 2016 11:26
[Task 23] Error when calculating array checksum 3 CrazyCapitan
Aug 19 2016
Quandray
Oct 12 2016 19:34
[Task#108] Star Medals what is the core idea of this task? (Star Medals 108) 3 LotvinSergey
Oct 5 2016
andydscott
Oct 7 2016 11:03
46 Tic-Tac-Toe one in 17 answers is wrong What am I missing? 2 flaxferrari
Oct 4 2016
flaxferrari
Oct 5 2016 17:26
help with interactive http tasks 3 andydscott
Oct 4 2016
andydscott
Oct 4 2016 13:14
Share price volatility - Standard deviation issue task 39 2 andydscott
Sep 27 2016
andydscott
Sep 27 2016 18:42
Most Frequent Word (Task 70) 10 BlaineThePain
Sep 19 2015
stanislav.zholnin
Sep 22 2016 19:56
Problem 61 - Prime Numbers Generation 7 bpzzt_br
Nov 9 2014
Quandray
Sep 11 2016 19:25
Safe landing 4 Leonid_Manieiev
Sep 3 2016
Leonid_Manieiev
Sep 4 2016 09:39
Rotate string the answer tallies But shows it is wrong 4 DunderMifflin
Aug 30 2016
DunderMifflin
Sep 3 2016 15:21
Billiard Ball bounce from bottom and right borders problem 10 Leonid_Manieiev
Aug 26 2016
Leonid_Manieiev
Aug 27 2016 15:58
Clarifying the task --- Breadth First Search --- Task 154 14 LotvinSergey
Aug 24 2016
LotvinSergey
Aug 26 2016 13:22
Need help(task 22) 5 DunderMifflin
Aug 26 2016
DunderMifflin
Aug 26 2016 12:07
Problem 35 Savings Calculators 3 ChillFruit
Aug 10 2016
ChillFruit
Aug 10 2016 12:24
Bubble Sort 3 Yaroslav Korchevoy
Aug 7 2016
NasekatNasushi
Aug 7 2016 13:51
Problem 78 (Bezier Curves) 2 Leonid_Manieiev
Aug 1 2016
Leonid_Manieiev
Aug 1 2016 00:56
Depth First Search 10 Vladimir_V
Jul 24 2015
Viach
Jul 14 2016 09:22
Is there a mistake in example for problem 156 (Task Luhn Algorithm) 3 Yaan Prokofiev
Jul 6 2016
Yaan Prokofiev
Jul 7 2016 11:47
fibbonacci squared but this always field 2 nurholisah042
Jun 17 2016
Matthew Cole
Jun 20 2016 15:25
[task 18] on C Sharp 4 madgerer
Jun 2 2016
madgerer
Jun 7 2016 14:20
Example for the Cows and Pigs problem is incorrect 2 GeorgySerga
Jun 2 2016
faked_IQ
Jun 3 2016 20:30
[Task#208] Known string neighborhood searching algorithms 1 tovarisch
May 26 2016
tovarisch
May 26 2016 18:55
Problem 141 description 16 Moff
Aug 7 2014
Abhisek
May 22 2016 17:20
Task 16 Average of an Array - Cplusplus 5 jpl_thefirst
May 2 2016
jpl_thefirst
May 4 2016 14:34
problem with task 24 2 Igor Bushminsky
Apr 25 2016
Quandray
Apr 25 2016 19:00
Problem 27 Bubble Sort help 4 leapingmanx
Nov 13 2015
Quandray
Apr 25 2016 11:50
Problem 66 my code doesnt decipher all sentences dont know whats wrong 2 Photon
Apr 16 2016
Quandray
Apr 24 2016 14:32
Problem 176 - getting the right answer but always losing the game - Python3 2 Thorin Schmidt
Apr 7 2016
Thorin Schmidt
Apr 7 2016 17:55
Color Cubes Advanced 2 Vladimir_V
Apr 2 2016
camel_case
Apr 4 2016 08:21
Aglae Robot 3 Vladimir_V
Apr 1 2016
Vladimir_V
Apr 1 2016 12:55
[Task#21] Array Counter - Quick Question 3 tammepoeg
Mar 22 2016
tammepoeg
Mar 23 2016 16:03
[Task#165] [problem 165] Safe Landing - Dont know whats wrong with my code 4 Mastermind
Mar 22 2016
Mastermind
Mar 22 2016 11:10
[Task#150] Introducing Regexps 2 inf_x_inf
Mar 13 2016
Rodion (admin)
Mar 20 2016 05:41
[Task#61] Prime numbers generator c sharp 7 Rafal Dunaj
Aug 6 2015
Matthew Cole
Mar 14 2016 21:47
LZ77_decompression 1 Vladimir_V
Mar 11 2016
Vladimir_V
Mar 11 2016 16:40
Problem 57 Smoothing the Weather 3 sleepijs
Mar 10 2016
sleepijs
Mar 11 2016 15:55
Problem 33 4 Sergey Afonin
Feb 20 2016
Matthew Cole
Mar 9 2016 22:29
Problem 67 6 james_cranston
Aug 27 2014
A Chauhan
Mar 3 2016 19:36
Bubble in Array java 3 knightdeadd
Feb 29 2016
knightdeadd
Mar 1 2016 02:43
Calculation of Pi 6 Vladimir_V
Sep 27 2015
Menshikov Ivan
Feb 26 2016 19:42
Help with Shannon-Fano Coding 2 b_pritom
Feb 23 2016
b_pritom
Feb 24 2016 10:49
156 Luhn Algorithm 3 Mister_Ed
Feb 19 2016
Mister_Ed
Feb 21 2016 12:07
Problem 36 2 Sergey Afonin
Feb 20 2016
Photon
Feb 21 2016 06:38
Problem 35 3 Sergey Afonin
Feb 20 2016
Sergey Afonin
Feb 20 2016 16:56
Selection Sort (120) 3 astjoemd
Feb 17 2016
astjoemd
Feb 17 2016 15:40
Problem 22 2 Sergey Afonin
Feb 14 2016
Quandray
Feb 14 2016 19:33
Some numbers do not match on 81 (Bit Count) 3 astjoemd
Feb 4 2016
astjoemd
Feb 4 2016 22:12
NimGame 177 2 Vladimir_V
Jan 29 2016
Quandray
Jan 30 2016 07:55
[Task#69] Fibonacci Divisibility 3 maxislinux
Jan 28 2016
maxislinux
Jan 29 2016 06:10
Query String Parameters --- the checker wont accept my URL Why? 6 LotvinSergey
Jan 20 2016
LotvinSergey
Jan 21 2016 19:25
Help with Bezier Curve (78) 1 calvinbbcard
Jan 18 2016
calvinbbcard
Jan 18 2016 17:05
Uphill Shooting (99) 7 Matthew Cole
Jan 8 2016
Quandray
Jan 10 2016 08:09
Help with 32 Josephus Problem 6 a_banderov
Aug 11 2014
ckoenders1990
Jan 7 2016 11:40
Frodo and Black Riders 5 Vladimir_V
Jan 2 2016
pj6444
Jan 3 2016 02:39
24 neumanns 3 Tazdingo
Jan 1 2016
Tazdingo
Jan 2 2016 16:01
[Task#19] 19 - Matching Brackets 1 Mononoke
Dec 31 2015
Mononoke
Dec 31 2015 19:17
Possible error or unexplained feature? 2 errorseven
Dec 28 2015
errorseven
Dec 28 2015 23:16
Problem 20 vowel count 9 sleepijs
Dec 22 2015
sleepijs
Dec 28 2015 09:21
17 Array Checksum 3 sleepijs
Dec 25 2015
sleepijs
Dec 26 2015 15:25
Binary Search in Array - IP database problem 3 Moff
Nov 4 2014
GlideThestral
Dec 22 2015 15:03
Easter Eggs 5 Vladimir_V
Dec 8 2015
GlideThestral
Dec 11 2015 14:41
task 33 Parity Control --- one space symbol before the answer 1 LotvinSergey
Dec 9 2015
LotvinSergey
Dec 9 2015 14:43
Average of an array rounding problem 7 transingularity
Jun 27 2015
kanat.s13
Dec 8 2015 08:55
Travelling Salesman 1 Vladimir_V
Dec 6 2015
Vladimir_V
Dec 6 2015 21:35
Task 13 - Weighted sum of digits 4 PandaProgram
Dec 1 2015
PandaProgram
Dec 2 2015 19:24
Combinations counting (task 128) - Whats wrong with my code? 6 rilianus
Oct 13 2014
Rodion (admin)
Nov 30 2015 08:40
[Task#192] Gangster Battles 3 Eugene Lim
Nov 19 2015
Eugene Lim
Nov 20 2015 19:57
Problem 144 Modular Inverse - sometimes solutions exist 2 GlideThestral
Nov 18 2015
Rodion (admin)
Nov 19 2015 05:39
Random Search Optimization - transition problems? 1 GlideThestral
Nov 18 2015
GlideThestral
Nov 18 2015 16:56
17 problem? 4 Vadimas S
Nov 16 2015
Rodion (admin)
Nov 16 2015 20:29
Girls and pigs - just a note 2 GlideThestral
Nov 12 2015
Rodion (admin)
Nov 12 2015 15:51
[Task#33] I thought I would get a cool secret message D 4 chris_bandit
Mar 19 2015
Rodion (admin)
Nov 6 2015 21:18
[Task#204] Wandering Star Algorithm 5 Moff
Mar 11 2015
Rodion (admin)
Nov 6 2015 11:21
Java error on this site 2 sneginko
Nov 6 2015
Rodion (admin)
Nov 6 2015 11:20
Problem 21 ? 5 sergey144010
Nov 4 2015
Rodion (admin)
Nov 4 2015 13:19
[Task#166] Page Rank as an Eigenvector 4 pj6444
Oct 19 2015
Rodion (admin)
Nov 3 2015 09:18
Task173 - Chords of music 4 chandan_t
Oct 19 2015
chandan_t
Oct 20 2015 07:04
[Task#23] Problem with Task 23 Two printers 6 Alex Charlton
Oct 16 2015
Rodion (admin)
Oct 16 2015 14:44
Cards Shuffling Problem 45 5 LRB_AlyEsch
Oct 11 2015
LRB_AlyEsch
Oct 14 2015 14:44
Employees Web App (task 199) 3 RenYuntao
Oct 9 2015
RenYuntao
Oct 9 2015 06:39
Frodo and Black Riders 15 Vladimir_V
Oct 2 2015
Guy Gervais
Oct 3 2015 12:16
Suffix Array Advanced 4 Vladimir_V
Oct 2 2015
Vladimir_V
Oct 3 2015 09:48
[Task#169] Check this out 3 Guy Gervais
Oct 1 2015
Guy Gervais
Oct 2 2015 09:50
Problem 09 Java 3 marcin_l
Sep 30 2015
marcin_l
Oct 1 2015 15:06
Crossing the Road 5 Vladimir_V
Sep 28 2015
Vladimir_V
Sep 29 2015 06:26
Card Shuffling (task 45) 4 chandan_t
Sep 21 2015
chandan_t
Sep 22 2015 09:02
[Task#40] Paths in the Grid - Feedback? (Task 40) 6 BlaineThePain
Sep 12 2015
BlaineThePain
Sep 19 2015 21:16
Problem 14 C 15 MontBlanc
Aug 12 2015
OldSchool
Sep 19 2015 11:11
Clarification for 210 Ticket Puzzle 7 Guy Gervais
Aug 30 2015
Rodion (admin)
Aug 30 2015 15:59
Problem 33 Parity Control 5 MontBlanc
Aug 15 2015
MontBlanc
Aug 16 2015 06:23
Bicycle Race Examples 1 nolanh08
Aug 14 2015
nolanh08
Aug 14 2015 20:03
[Problem 67] Problem in C with size of input 8 NatholBMX
Dec 14 2014
Christopher Matthews
Aug 12 2015 06:45
Task 67 - Test-cases exceed range of long type (java) 5 nolanh08
Aug 11 2015
nolanh08
Aug 11 2015 17:05
Problem 176 interactive problem Sending correct answer but always end up losing game 6 EricStern
Aug 8 2015
Quandray
Aug 8 2015 09:45
Bubble in Array-- my algorithm solves the example lists but not the test case 4 d_r_burton
Aug 4 2015
Rodionische
Aug 4 2015 19:20
Neumanns Random Generator 3 transingularity
Aug 2 2015
Rodion (admin)
Aug 2 2015 17:09
[Task#134] Bad Practice? 6 Marchel Sugi
Jul 27 2015
Rodion (admin)
Jul 28 2015 16:17
[Task#12] Modulo and time difference - request for code review (Python) 5 Ryan_Sabara
Jul 27 2015
Ryan_Sabara
Jul 28 2015 10:06
Easter Eggs 5 Vladimir_V
Jul 24 2015
Vladimir_V
Jul 24 2015 12:18
Gradient Calculation (task 101) 2 Vladimir_V
Jul 23 2015
Rodion (admin)
Jul 23 2015 10:42
17 Array Checksum - Is my checksum algorithm correct? 3 ugsdhfjbnsja
Jul 21 2015
ugsdhfjbnsja
Jul 21 2015 21:05
[Task#80] Problem 80 Solution Explaination 5 YetAnotherMinion
Jul 19 2015
YetAnotherMinion
Jul 19 2015 21:13
[Task#205] Problem with Clustering the Stars checker 2 Moff
Jul 19 2015
Rodion (admin)
Jul 19 2015 14:20
[14] [C] How do we deal with large intermediate numbers? 6 ugsdhfjbnsja
Jul 18 2015
Ratzenfutz
Jul 18 2015 21:53
Clustering the Stars 1 Guy Gervais
Jul 18 2015
Guy Gervais
Jul 18 2015 17:24
[Important] Problem 104 Solution Explanation - Spoiler alert 3 Ratzenfutz
Jul 17 2015
Ratzenfutz
Jul 17 2015 16:08
Array Counter (task 21) 4 Ratzenfutz
Jul 13 2015
Ratzenfutz
Jul 15 2015 20:32
[Task#50] Palindrome problem 6 transingularity
Jul 7 2015
transingularity
Jul 10 2015 10:15
Triangle Area rounding problem 3 transingularity
Jul 1 2015
Rodion (admin)
Jul 8 2015 11:00
Im doing something wrong? 14 Leonid_Manieiev
Jun 26 2015
Leonid_Manieiev
Jul 2 2015 15:36
Task14 Problem 3 transingularity
Jun 29 2015
Rodion (admin)
Jun 29 2015 10:39
Unable to do the maths behind problem 10 2 ugsdhfjbnsja
Jun 27 2015
ugsdhfjbnsja
Jun 27 2015 19:01
DungeonsAndDragonsDice 6 Vladimir_V
Jun 24 2015
Guy Gervais
Jun 25 2015 21:55
Flying Text Screensaver 2 Vladimir_V
Jun 21 2015
Ashish Padalkar
Jun 22 2015 11:53
Task 144 Explanation 3 OldProgrammer
May 31 2015
OldProgrammer
Jun 8 2015 21:50
Problem 119 Brain Fibo 2 derkach91
Jun 4 2015
OldProgrammer
Jun 8 2015 20:40
Girls and pigs number of solutions 4 cescapa
May 19 2015
drewcocker
May 25 2015 06:41
Is the testing system works as it should? 3 Leonid_Manieiev
May 21 2015
Leonid_Manieiev
May 21 2015 23:30
Problem 22 2 Adam Lines
May 15 2015
Rodion (admin)
May 17 2015 06:32
A question about Problem 119 Brain Fibo 3 Shaohua Mao
May 1 2015
Shaohua Mao
May 1 2015 22:41
[Task 80] explanation on authors notes on the problem ? 4 flitzpiepe
Apr 20 2015
flitzpiepe
Apr 29 2015 06:32
[Task#104] Triangle Area revision on authors notes 1 Rafael E
Apr 15 2015
Rafael E
Apr 15 2015 20:49
Task 14 - C - Getting wrong solution and unable to locate why 3 John-Russell
Apr 12 2015
John-Russell
Apr 12 2015 20:57
[Task 35] Savings Calculator wrong result ? 6 flitzpiepe
Apr 9 2015
flitzpiepe
Apr 10 2015 05:31
Task 14 - Im getting the wrong result and I dont know why Help 3 gadekryds.ds
Apr 6 2015
gadekryds.ds
Apr 7 2015 10:20
[187] Static Web Page 2 go_coder
Apr 3 2015
Rodion (admin)
Apr 6 2015 08:54
Two Printers 9 Scaevola
Dec 26 2014
rockyfive
Mar 25 2015 00:11
Task 13 - Weighted sum of digits 12 christianlauw123
Feb 17 2015
Vadim Tukaev
Mar 4 2015 10:35
What wrong with dancing pairs? 7 Moff
Feb 22 2015
nicolas_patrois
Feb 23 2015 14:36
Enumerating Combinations (task 129) 6 Matthew Cole
Feb 16 2015
Christopher Matthews
Feb 21 2015 07:47
[Task#201] What I have done 7 nicolas_patrois
Feb 19 2015
nicolas_patrois
Feb 20 2015 19:45
[Task#86] Simple brainfk interpreter (private) 3 Moff
Feb 13 2015
nicolas_patrois
Feb 13 2015 18:09
My problem with Dynamic Web Page at PythonAnywhere 5 Aghiad
Feb 1 2015
Aghiad
Feb 2 2015 21:04
Problem with PythonPrintHexStr task 3 vidu333
Feb 1 2015
TestUser
Feb 1 2015 08:45
Hexagonal Grid 7 hogarth45
Jan 29 2015
Rodion (admin)
Jan 29 2015 20:49
[Task#199] Employees Web App 3 Moff
Jan 28 2015
Moff
Jan 28 2015 14:54
[Task#193] Maximum Flow 3 Moff
Jan 18 2015
nicolas_patrois
Jan 19 2015 14:56
Tricky Printing - Brainfuck problem 3 hogarth45
Jan 17 2015
Rodion (admin)
Jan 17 2015 17:47
task 16 Average of an array I dont get why this rounding doesnt work 2 Mr Monstr
Jan 17 2015
Mr Monstr
Jan 17 2015 17:18
Flow Network 6 Moff
Jan 17 2015
Rodion (admin)
Jan 17 2015 17:07
[Task#36] code guesser Did anyone solve it a better way 4 smwentum
Jan 4 2015
Matthew Cole
Jan 15 2015 10:32
Problems with problem 116 5 vip_gevorg
Aug 18 2014
Rodion (admin)
Jan 12 2015 15:45
[Task#14] What is the use of this problem? 2 ahkamyaqeen
Jan 12 2015
Rodion (admin)
Jan 12 2015 13:09
Static Web Page - https 3 Moff
Jan 8 2015
Moff
Jan 8 2015 20:05
Prime Chains 12 Guy Gervais
Aug 20 2014
Quandray
Dec 24 2014 13:22
[Problem 50] CPU time limit exceeded (core dumped) 3 gravoo
Dec 21 2014
gravoo
Dec 22 2014 14:36
Counting Vowels Problem 3 Brandon VanderMey
Dec 4 2014
Brandon VanderMey
Dec 4 2014 07:56
[Task#128] Combinations Counting 4 Maximization
Nov 30 2014
Rodion (admin)
Dec 1 2014 15:42
DFS works fine with example but still fails (Task 155) 4 Mikhail Laptev
Nov 26 2014
Mikhail Laptev
Dec 1 2014 13:28
[Task#31] Rotate String 4 Maximization
Nov 25 2014
script_kiddie
Nov 29 2014 11:40
[Task#179] Look and Say binary 3 Moff
Nov 28 2014
nicolas_patrois
Nov 28 2014 13:27
[Task#178] Maze of the Wumpus - methods to generate maze 2 Moff
Nov 24 2014
Rodion (admin)
Nov 24 2014 10:15
C Sharp Problem 67 2 rizk.christopher
Nov 19 2014
Rodion (admin)
Nov 20 2014 06:04
[Task#175] Algae Robot - tips and trics 4 Moff
Nov 19 2014
Rodion (admin)
Nov 19 2014 15:08
[Task#174] The last digits 3 nicolas_patrois
Nov 13 2014
nicolas_patrois
Nov 13 2014 21:05
[Task#173] Chords of Music - test data correctness 7 Moff
Nov 10 2014
Moff
Nov 11 2014 14:06
[Task#167] BF - Copy Line 3 Moriarty
Oct 24 2014
Moriarty
Oct 26 2014 05:49
[Task#168] Caesar meets BF 11 Moff
Oct 21 2014
nicolas_patrois
Oct 22 2014 05:37
[Task#167] Copy Line checker 8 Moff
Oct 20 2014
Rodion (admin)
Oct 21 2014 08:18
[Task#159] Hard Life Solutions 3 Eldzik
Oct 6 2014
Rodion (admin)
Oct 7 2014 04:39
Palindromic Primes 19 Guy Gervais
Sep 5 2014
Rodion (admin)
Sep 8 2014 11:27
[Task#155] Solution visualization 6 Moff
Sep 3 2014
Guy Gervais
Sep 4 2014 10:44
problem 57 6 james_cranston
Aug 25 2014
Rodion (admin)
Aug 26 2014 18:05
[Task#151] Word Ladders solving methods 13 nicolas_patrois
Aug 23 2014
Moff
Aug 25 2014 12:09
Introducing Regexps - minor problems 5 Guy Gervais
Aug 22 2014
Guy Gervais
Aug 22 2014 17:56
[Task#147] Color Cubes Advanced 6 Guy Gervais
Aug 19 2014
Guy Gervais
Aug 19 2014 21:41
[Task#145] Two solutions for task 145 12 nicolas_patrois
Aug 12 2014
Guy Gervais
Aug 13 2014 01:55
[Task#145] Task 145 is that OK Oh and its really looks nothing like Python 2 rdebath
Aug 12 2014
Rodion (admin)
Aug 12 2014 09:39
[Task#144] Another algorithm for Task 144 private 1 Moff
Aug 12 2014
Moff
Aug 12 2014 08:04
Modular Inverse unittest 11 Moff
Aug 11 2014
nicolas_patrois
Aug 11 2014 15:55
Minor corrections for 143 and 144 2 Guy Gervais
Aug 11 2014
Rodion (admin)
Aug 11 2014 11:06
Correction in Task 124 2 Moriarty
Aug 9 2014
Rodion (admin)
Aug 9 2014 05:07