HighLoad Challenges for Fun

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#1
Victor MerckléVictor MerckléGrandmaster
171'854.64 RP
#2
Josu San MartinJosu San MartinMaster
105'966.62 RP
#3
olliecrowolliecrowMaster
91'705.67 RP
#UserLevelRP
4
Yuriy LyfenkoYuriy Lyfenko
Master88'585.92
5
Dominique GarmierDominique Garmier
Expert51'455.74
6
limanjun99limanjun99
Expert43'657.72
7
Aniruddha DebAniruddha Deb
Expert43'361.46
8
Joad NacerJoad Nacer
Expert41'820.88
9
M-RochatM-Rochat
Expert40'136.63
10
KeefeKeefe
Expert35'247.97
11
zielajzielaj
Expert33'894.81
12
Charles CabergsCharles Cabergs
Expert33'717.77
13
Sergey StreminSergey Stremin
Expert33'423.04
14
Andrey LikhachevAndrey Likhachev
Expert33'012.74
15
Aleksei ShahoikaAleksei Shahoika
Expert30'506.03
16
Robert BurkeRobert Burke
Expert27'360.04
17
matsuoka-601matsuoka-601
Expert26'616.08
18
AnSaAnSa
Expert26'374.35
19
TudyMTudyM
Expert25'025.95
20
gchebanovgchebanov
Expert23'931.76
21
Sergey SerebryakovSergey Serebryakov
Expert22'249.59
22
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Expert21'419.45
23
Bernard TeoBernard Teo
Skilled21'256.19
24
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Skilled21'071.61
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Skilled20'972.50
26
BenBen
Skilled20'726.04
27
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Skilled18'147.30
28
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Skilled17'173.03
29
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Skilled16'732.03
30
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Skilled15'457.71
31
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32
izotoffizotoff
Skilled14'644.90
33
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Skilled13'735.08
34
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35
NoSIMD_C#NoSIMD_C#
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36
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Skilled13'138.37
37
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38
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39
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40
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41
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42
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43
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44
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48
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49
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51
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52
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53
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54
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55
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56
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57
Hung T.NguyenHung T.Nguyen
Skilled7'731.38
58
highloadLLMhighloadLLM
Skilled7'575.54
59
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Skilled7'523.21
60
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61
yenw0dyenw0d
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62
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63
ii14ii14
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64
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65
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66
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67
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68
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69
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Skilled5'556.90
70
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71
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72
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73
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74
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75
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76
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77
AndreiAndrei
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78
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79
someone12469someone12469
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80
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81
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82
caandocaando
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83
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84
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Skilled4'349.10
85
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Skilled4'273.95
86
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Skilled4'202.00
87
piculpicul
Apprentice4'156.87
88
MatthiasMatthias
Apprentice3'996.99
89
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Apprentice3'865.85
90
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Apprentice3'863.14
91
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92
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93
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Apprentice3'771.94
94
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95
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96
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Apprentice3'589.58
97
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Apprentice3'557.22
98
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Apprentice3'540.32
99
Jem BishopJem Bishop
Apprentice3'537.58
100
BenBen
Apprentice3'534.34
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Level Thresholds
Apprentice800.00
Skilled4'200.00
Expert21'400.00
Master64'400.00
Grandmaster146'000.00
Dynamic · #1 player: 171'854.64 RP
News
2026-04-29

🎉5 years of HighLoad.Fun!🎉 Half a decade ago, the domain was registered - and what started as an idea has grown into a community of engineers obsessed with squeezing every last nanosecond out of their code. Thanks for being here.

2026-01-01

The 2025 leaderboard is officially closed! Explore the final results by visiting this link. Share your certificates proudly—they will stay available as long as the site is live!

2025-01-01

The 2024 leaderboard is officially closed! Explore the final results by visiting this link. Share your certificates proudly—they will stay available as long as the site is live!

2024-11-10

New supported language Zig was added.

2024-08-31

The checker server’s OS has been upgraded to Ubuntu 24.04.

View all news →
Recent Articles
zielaj
Parse integers task: memory access pattern
by zielaj · Apr 23, 2026
7Sergey Svistunov
Using MMAP to optimize data reading
by Sergey Svistunov · Apr 19, 2026
3
Recent Discussions
Sergey Svistunov
I’ve just tuned a little bit the server, MAP_HUGETLB should work now.
by Sergey Svistunov on Using MMAP to optimize data reading · Apr 24, 2026
zielaj
FYI This is a republishing an article that I originally sent to the telegram channel pre-upgrade.
by zielaj on Parse integers task: memory access pattern · Apr 23, 2026
Danylo Mocherniuk
Doesn’t work for me neither.
by Danylo Mocherniuk on Using MMAP to optimize data reading · Apr 23, 2026
zielaj
Does MAP_HUGETLB work for anyone on highload.fun? I remember trying it a long time ago on “Parse...
by zielaj on Using MMAP to optimize data reading · Apr 21, 2026
Recent Submissions
View all →
Victor MerckléVictor Mercklé→Count uint8CPP
just now		Success
Victor MerckléVictor Mercklé→Count uint8CPP
7 minutes ago		Success
Victor MerckléVictor Mercklé→Parse integersRUST
11 minutes ago		Success
Victor MerckléVictor Mercklé→Blue color from RGBACPP
16 minutes ago		Success
Victor MerckléVictor Mercklé→Blue color from RGBACPP
21 minutes ago		Success
Victor MerckléVictor Mercklé→Parse integersRUST
26 minutes ago		Success
Victor MerckléVictor Mercklé→Blue color from RGBACPP
28 minutes ago		Success
Victor MerckléVictor Mercklé→Parse integersRUST
31 minutes ago		Success
Victor MerckléVictor Mercklé→Blue color from RGBACPP
33 minutes ago		Success
Victor MerckléVictor Mercklé→Parse integersRUST
36 minutes ago		Error
Recent Solution Challenges
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highloadLLMhighloadLLM-10.00→Victor Mercklé·Order book
2 days ago		Pending
highloadLLMhighloadLLM-10.00→Victor Mercklé·Cross-Margin Liquidation Engine
5 days ago		Solution Held
Josu San MartinJosu San Martin-21.44→Dmtry·Order book
10 days ago		Solution Held
Josu San MartinJosu San Martin-10.00→Dmtry·Order book
10 days ago		Solution Held
Josu San MartinJosu San Martin+41.84→Jem Bishop-167.36·Order book
10 days ago		Solution Broken
Josu San MartinJosu San Martin+45.62→Jem Bishop-182.49·Order book
11 days ago		Solution Broken
Josu San MartinJosu San Martin+485.52→Aniruddha Deb-1'942.08·Order book
11 days ago		Solution Broken
Josu San MartinJosu San Martin+5.94→Jem Bishop-23.74·Order book
11 days ago		Solution Broken
Josu San MartinJosu San Martin+11.02→Jem Bishop-44.07·Order book
11 days ago		Solution Broken
Josu San MartinJosu San Martin+101.95→Aniruddha Deb-407.79·Order book
11 days ago		Solution Broken