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競技プログラミングで見るRubyの豊かさ
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haruguchi-yuma
August 24, 2024
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競技プログラミングで見るRubyの豊かさ
haruguchi-yuma
August 24, 2024
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Transcript
!IBSVHVDIJ ڝٕϓϩάϥϛϯάͰݟΔ 3VCZͷ๛͔͞ େࡕ3VCZձٞɹ 4BU
!IBSVHVDIJ wגࣜձࣾӬγεςϜϚωδϝϯτ wڭһˠ8FCΤϯδχΞ wڝϓϩྺ
None
ڝϓϩ "U$PEFS ͱ
ೖྗˠग़ྗ ͳΜ͔͢Δ
ͨͱ͑
ͨͱ͑
ͨͱ͑
ͨͱ͑
None
None
None
ࠓͷ ɾ"U$PEFSͷௐ·ͨ͠ ɾͦͷத͔Βհ
େࣄʹ͍ͨ͠Ձ؍ Մಡੑ ֦ுੑ อकੑ
Մಡੑ ֦ுੑ อकੑ ಡΈʹ͘͘ ෳࡶͰ͘ ʹಛԽͨ͠ ίονʂʂ େࣄʹ͍ͨ͠Ձ؍
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@ ))ͷΛٻΊ͍ͨ
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@ ))ͷΛٻΊ͍ͨ ೖྗྫ 42 3 ग़ྗྫ 39
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@ ))ͷΛٻΊ͍ͨ ೖྗྫ 42 3 ग़ྗྫ 39
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@ ))ͷΛٻΊ͍ͨ
ϙΠϯτ จࣈϦςϥϧ? joinͷΤΠϦΞε*
ϙΠϯτ จࣈϦςϥϧ? joinͷΤΠϦΞε*
ϙΠϯτ ίϚϯυͱ࣮ͯ͠ߦ evalͰअѱ͞Λԋग़
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@ ))ͷΛٻΊ͍ͨ ࠶ܝ ͬͱ͘ॻ͚ΔΑͱ͍͏ਓ͕͍ͨΒڭ͍͑ͯͩ͘͞
ͭͷ୯ޠ͕ۭന۠ΓͰ༩͑ΒΕΔɻ ֤୯ޠͷઌ಄Λͭͳ͛ɺେจࣈͰग़ྗ͍ͨ͠
ೖྗྫ atcoder beginner contest IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B ͭͷ୯ޠ͕ۭന۠ΓͰ༩͑ΒΕΔɻ ֤୯ޠͷઌ಄Λͭͳ͛ɺେจࣈͰग़ྗ͍ͨ͠
ೖྗྫ atcoder beginner contest IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B ͭͷ୯ޠ͕ۭന۠ΓͰ༩͑ΒΕΔɻ ֤୯ޠͷઌ಄Λͭͳ͛ɺେจࣈͰग़ྗ͍ͨ͠
ೖྗྫ atcoder beginner contest IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B ͭͷ୯ޠ͕ۭന۠ΓͰ༩͑ΒΕΔɻ ֤୯ޠͷઌ಄Λͭͳ͛ɺେจࣈͰग़ྗ͍ͨ͠ ग़ྗྫ
ABC
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B ͭͷ୯ޠ͕ۭന۠ΓͰ༩͑ΒΕΔɻ ֤୯ޠͷઌ಄Λͭͳ͛ɺେจࣈͰग़ྗ͍ͨ͠
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B ͭͷ୯ޠ͕ۭന۠ΓͰ༩͑ΒΕΔɻ ֤୯ޠͷઌ಄Λͭͳ͛ɺେจࣈͰग़ྗ͍ͨ͠ ͏গ͘͠Ͱ͖ͦ͏ ಡΈʹ͘͘
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B ͭͷ୯ޠ͕ۭന۠ΓͰ༩͑ΒΕΔɻ ֤୯ޠͷઌ಄Λͭͳ͛ɺେจࣈͰग़ྗ͍ͨ͠
ϙΠϯτ େจࣈͷมord
ϙΠϯτ େจࣈͷมord ڝϓϩͰكʹΑ͘͏ʂ
ϙΠϯτ ඪ४ग़ྗputc
" # $ͷΈ͔ΒͳΔ/จࣈͷจࣈྻ4 " # $͕ճҎ্ग़ݱ͢ΔͷԿจࣈʁ
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B ೖྗྫ 9 AACCCACBB " # $ͷΈ͔ΒͳΔ/จࣈͷจࣈྻ4 "
# $͕ճҎ্ग़ݱ͢ΔͷԿจࣈʁ
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B ೖྗྫ 9 AACCCACBB 123456789 ग़ྗྫ 8
" # $ͷΈ͔ΒͳΔ/จࣈͷจࣈྻ4 " # $͕ճҎ্ग़ݱ͢ΔͷԿจࣈʁ
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B " # $ͷΈ͔ΒͳΔ/จࣈͷจࣈྻ4 " # $͕ճҎ্ग़ݱ͢ΔͷԿจࣈʁ
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B " # $ͷΈ͔ΒͳΔ/จࣈͷจࣈྻ4 " # $͕ճҎ্ग़ݱ͢ΔͷԿจࣈʁ
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B " # $ͷΈ͔ΒͳΔ/จࣈͷจࣈྻ4 " # $͕ճҎ্ग़ݱ͢ΔͷԿจࣈʁ indexʹ߹ܭCZUFͬͯΔʂʂ
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B " # $ͷΈ͔ΒͳΔ/จࣈͷจࣈྻ4 " # $͕ճҎ্ग़ݱ͢ΔͷԿจࣈʁ
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B " # $ͷΈ͔ΒͳΔ/จࣈͷจࣈྻ4 " # $͕ճҎ্ग़ݱ͢ΔͷԿจࣈʁ $_ ͕3ՕॴʹݱΕΔͷ
IUUQTBUDPEFSKQDPOUFTUTBCDUBTLTBCD@B " # $ͷΈ͔ΒͳΔ/จࣈͷจࣈྻ4 " # $͕ճҎ্ग़ݱ͢ΔͷԿจࣈʁ
ϙΠϯτ Regexp#~ $_ͱͷؒͰϚονΛͱΔ
ϙΠϯτ ΠϯΫϦϝϯτ bitస ୯߲ԋࢉ -
·ͱΊ·͢
·ͱΊ ɾ͍ΖΜͳॻ͖ํ͕Ͱ͖Δ ɾϝιουͷ๛͞ ɾ߈ུຊʹࡌͬͯͳ͍ॻ͖ํΛ୳ָ͢͠͞
3VCZJTGVO ,ZPQSPJTGVOTP UBLFUIFDIBMMFOHF