Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Sign up for free
Menu
Search
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Pricing
Search
Sign in
Sign up for free
Rustで始める競技プログラミング
Search
minami
September 17, 2019
Programming
340
0
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
Rustで始める競技プログラミング
Rustで始める競技プログラミング
minami
September 17, 2019
More Decks by minami
See All by minami
Autocxx -RustからC++を安全かつ楽に-
minaminao
2
1.5k
Account/Balanceモデルのシャーディングと課題点
minaminao
1
820
Other Decks in Programming
See All in Programming
Vue Fes Japan 2026 タイムテーブル徹底解説
448jp
1
650
見えないものを探る要求要件定義に必要な基本的思考 / invisible-requirement-thinking
minodriven
15
8.1k
Ghostty + Neovimで作る 透明でカッコ良い開発環境
j341nono
0
160
IBM Bob Dojo #1 仕様駆動開発入門
oniak3ibm
PRO
0
370
mrbgem 三角測量 開発
ogom
0
230
難しいけど、読めた。- OSSの入口に立った話。
sts11142
0
150
パズルゲームの作り方 / how to make puzzle games
kaityo256
PRO
2
280
ソニーのクラウド共通基盤の変遷とAI時代の開発スタイルに合わせた進化 / The Journey of Sony’s Common Cloud Platform and Its Evolution for AI-Native Development
kenjiyoneyama
0
250
AIに “答え“を書かせるのを やめてみた
___akari11
0
110
複雑なUIコンポーネントとの ⻑い付き合い⽅:波及するバグからテスト戦略を経て、安全な再設計へ
mixplace
0
330
SREの越境 / SRE Collaboration
y0hgi
2
300
Workers Cache を知る
syumai
0
350
Featured
See All Featured
Exploring anti-patterns in Rails
aemeredith
4
530
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
danielanewman
230
23k
Mind Mapping
helmedeiros
1
400
Highjacked: Video Game Concept Design
rkendrick25
PRO
1
480
Skip the Path - Find Your Career Trail
mkilby
1
250
Have SEOs Ruined the Internet? - User Awareness of SEO in 2025
akashhashmi
0
520
What’s in a name? Adding method to the madness
productmarketing
PRO
24
4.2k
The Spectacular Lies of Maps
axbom
PRO
1
1.1k
Into the Great Unknown - MozCon
thekraken
41
2.8k
Reality Check: Gamification 10 Years Later
codingconduct
0
2.3k
Avoiding the “Bad Training, Faster” Trap in the Age of AI
tmiket
0
270
The Mindset for Success: Future Career Progression
greggifford
PRO
0
530
Transcript
3VTUͰ࢝ΊΔ ڝٕϓϩάϥϛϯά NJOBNJOBP SPQQPOHJST
Ԭೆ࠸ NJOBNJOBP !WJOBNJ ࣗݾհ ஜେֶใֶ܈ใՊֶྨ d-BZFS93%νʔϜ
ڝϓϩͱ ಘΒΕΔͷ ࣍ ·ͱΊ
ڝٕϓϩάϥϛϯάͱ ͕༩͑ΒΕΔ ɾ࣮ߦ࣌ؒͱϝϞϦ༻ྔͷ্ݶ͖ ͦΕΛղ͘ϓϩάϥϜΛ࣮ˍఏग़ αʔόʔ͕ਖ਼ղ͔ఆ ղ͚͕ͨଟ͍ํ͕উͪ
ڝϓϩͰಘΒΕΔͷ ɾϓϩάϥϛϯάݴޠͷࣝͱ࣮ྗ ɾղܾྗɺཧతࢥߟྗɺֶྗ ɾߴͳϓϩάϥϜͷ࣮ํ๏ ΞϧΰϦζϜͱσʔλߏ
ΞϧΰϦζϜͱσʔλߏ ߹ֶͤɺแআݪཧɺׂɺηάϝϯτπϦʔɺฏํׂɺώʔϓɺ#JOBSZ *OEFYFE5SFFɺฏߧೋ୳ࡧɺ࠲ඪѹॖɺLEɺ6OJPO'JOEɺಈత࠷దԽɺήʔ Ϝཧɺ࠷૿Ճ෦ྻɺ८ճηʔϧεϚϯɺ࠷খแؚٿɺزԿɺ࠷খॏΈࡾ֯ ܗׂɺάϥϑཧɺ࠷ܦ࿏ɺɺ-PXFTU$PNNPO"ODFTUPSɺϚονϯάɺ ด࿏ݕग़ɺ࠼৭ɺ-PXMJOLɺ࠷খશҬɺτϙϩδΧϧιʔτɺڧ࿈݁ղɺ ᩦཉ๏ɺઢܗɺΨεͷফڈ๏ɺɺೋ߲ɺ($%-$.ɺૉҼղɺ ղੳɺೋ๏ɺϥάϥϯδϡิؒɺιʔτɺసɺ.BOBDIFSɺ.PSSJTr1SBUUɺ ϩʔϦϯάϋογϡɺ4V⒏Y"SSBZɺ;"MHPSJUINɺ͠Ό͘ͱΓ๏ɺ ͜ΕΒ
Ұྫ Λཧղˍ͑ΔΑ͏ʹͳΔ
ૣͬͯΈΔ 3VTUͰʂ
"#$"1SPEVDU IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B
"#$"1SPEVDU wਖ਼B C͕ඪ४ೖྗ͔Β༩͑ΒΕΔ wۭന۠Γ wB C͕ۮͳΒ&WFOΛحͳΒ0EEΛग़ྗ wB C ֓ཁ
wඪ४ೖྗΛ͏VTFTUEJP wۮ͔Ͳ͏͔JG B C ϙΠϯτ "#$"1SPEVDU w
IUUQTBUDPEFSKQDPOUFTUTBCDTVCNJTTJPOT ղྫ
"#$"1SPEVDUղྫ
"#$"1SPEVDUղྫ ೖྗΛָʹ͍ͨ͠ʂ
ۭനɾվߦ͝ͱʹೖྗΛಘΔؔ
ۭനɾվߦ͝ͱʹೖྗΛಘΔؔ w 3VTUͰڝٕϓϩάϥϛϯάͷೖྗΛεοΩϦهड़͢ΔϚΫϩ2JJUB CZͨͳ͜;͞Μ w IUUQTRJJUBDPNUBOBLIJUFNTCBDDBDEEBD ߋʹߴػೳͳೖྗิॿ Θ͔Γ͍͢
"#$"1BSLJOH IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B
"#$"1SPEVDU wறंͷྉۚϓϥϯ͕छྨ wϓϥϯ5࣌ؒͰ" 5ԁ wϓϥϯ#ԁݻఆ wਖ਼/ " #͕༩͑ΒΕΔ w/࣌ؒறं͢Δͱ͖ͷ࠷҆ͷஈʁ
֓ཁ
wNJOؔVTFTUEDNQNJO wNJO B C ϙΠϯτ "#$"1SPEVDU
දతίϯςεταΠτ AtCoder Codeforces Google Code Jam ։࠵ස 1,2ճ/ि 6ճ͘Β͍/݄ 1ճ/
ࢀՃਓ/ճ 5000ਓ 10000ਓ 35000ਓ ։࠵ࠃ ຊ ϩγΞ - จ ຊޠ / ӳޠ ӳޠ ӳޠ Rust version 1.15.1 1.35.0 ະରԠ
Ϩϕϧ 100 ࢛ଇԋࢉ, จࣈྻૢ࡞ 200 ݅ذ, ϧʔϓ 300
ιʔτͳͲͷΞϧΰϦζϜͷ͕ࣝඞཁʹ 400 ~ ܭࢉྔͷݟੵΓ͕ඞཁʹ 2000Ҏ্ͷ
"#$# IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@C
"#$# wਖ਼B C͕ඪ४ೖྗ͔Β༩͑ΒΕΔ wۭന۠Γ wBͱCΛจࣈྻͱͯ͠ܨ͛ͨͱ͖ฏํ͔ʁ wྫlz? wฏํͳΒ:FTɺͦ͏Ͱͳ͍ͳΒ/PΛग़ྗ wB C
֓ཁ
wจࣈྻ݁߹GPSNBU l\^\^z B C w4USJOHUPJTJ[FTQBSTFJTJ[F VOXSBQ ϙΠϯτ "#$#
w YBͱCΛ݁߹ͨ͠ w JdY·ͰJ JYΛຬͨ͢ͷ͕ଘࡏ͢Δ͔ௐΔ w ଘࡏ͢ΔͳΒYฏํ ղྫ
"#$#ղྫ ͜ͷղ๏ͷܭࢉྔ0 Y ߋʹྑ͍ղ๏ ɾJd㲋YͰ୳ࡧ0 㲋Y ɾJʹ͍ͭͯೋ୳ࡧ0 MPHY
ܭࢉྔ ྫ 1ඵҎͰ O(1) ࢛ଇԋࢉͳͲ - O(n) n=10^8·Ͱ O(n^2) n=10^4·Ͱ
O(log n) ೋ୳ࡧͳͲ ͨ͘͞Μ O(n log n) ιʔτͳͲ n=10^5·Ͱ ܭࢉྔ w0 O Oճܭࢉ͢ΔͳΒ0 O wఆഒແࢹOճܭࢉ͢Δͱͯ͠0 O #JH0ه๏
"#$#7BSJFE IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@C
"#$#7BSJFE wӳখจࣈ͔ΒͳΔจࣈྻ4͕༩͑ΒΕΔ w4ʹؚ·ΕΔจࣈ͕શͯҟͳΔ͔Ͳ͏͔ wҟͳΔͳΒZFTɺͦ͏Ͱͳ͍ͳΒOPΛग़ྗ w4ͷ͞ ֓ཁ
"#$#7BSJFEղྫ w4USJOHT<J>ͷΑ͏ʹจࣈͷऔಘ͕Ͱ͖ͳ͍ w4USJOH͔Β7FDDIBSʹม͢Δ ϙΠϯτ
"#$$1SJTPO IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@D
"#$$1SJTPO w/ຕͷ*%Χʔυ .ຕͷήʔτ wήʔτ*%ΧʔυͰ௨ΕΔ wJ൪ͷήʔτ-@Jd3@J൪ͷ*%ΧʔυͰ௨ΕΔ wͲΕ͔͍ͭ࣋ͬͯΕ͍͍ wຕ͚ͩͰશήʔτΛ௨աͰ͖Δ*%ΧʔυԿຕ͔ w/? .?
w-@J3@J/ ֓ཁ
4BNQMF ID1 ID2 ID3 ID4 G1 G2 /. -@ 3@
-@ 3@ ൪ͱ൪ͷ*%Χʔυ͕શήʔτΛ௨ΕΔ
4BNQMF ID1 2 3 4 5 6 7 8 9
10 G1 G2 G3 ൪ͷ*%ΧʔυͷΈશήʔτΛ௨ΕΔ
"#$$1SJTPOղྫ
"#$$0UPTIJEBNB IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@D
"#$$0UPTIJEBNB wԁࡳɺԁࡳɺԁࡳ͕ແݶʹ͋Δ w͓ࡳ͕/ຕɺ߹ܭ:ԁ wԁࡳYຕɺԁࡳZຕɺԁࡳ[ຕͱ͢Δ w༗ΓಘΔຕͷ߹ͤͭΛग़ྗ w:ԁͳΒɺ Y Z [
ͳͲ ֓ཁ
5-&ղ
5-&ղ0 O? O? ?ؒʹ߹Θͳ͍
"$ղ0 O?
·ͱΊ
·ͱΊ wѹతΞτϓοτ͕Ͱ͖Δ wܭࢉྔ͕ݟੵΕΔΑ͏ʹͳΔ wΞϧΰϦζϜͱσʔλߏʹৄ͘͠ͳΕΔ w࣮ྗ͕ఆྔԽ͞ΕΔ wԿΑΓָ͍͠ w࣮ߦʹ͔͔Δॲཧ͕ඵͰͰ͖ͨΓ wʹʹίʔσΟϯάεϐʔυ͕͘ͳͬͨΓ
͓·͚ʢPKʹΑΔࣗಈఏग़ʣ IUUQTHJUIVCDPNNJOBNJOBPBUDPEFSSVTUCMPCNBTUFSWTDPEFUBTLTKTPO IUUQTHJUIVCDPNLNZLPOMJOFKVEHFUPPMT