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answer/85.md
@@ -7,3 +7,12 @@ $ echo 🍑 🍓 | xargs -n1 | perl -nlE 'say unpack("H*",$_)' | xargs | awk '{p
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別解1(上田)$ echo 🍑 🍓 | xxd -i | mawk -F, '{for(i=1;i<=4;i++){printf("%x", ($i + $(i+5))/2)}}' | xxd -p -r
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別解2(田代)$ echo 🍑 🍓 | xxd -u -p -l 4 | sed 's/^/obase=16;ibase=16;/;s/$/+1/' | bc | xxd -p -r
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```
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+
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+ ### 読者別解
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+ by [kariya-mitsuru](https://github.com/kariya-mitsuru)
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+```
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+$ echo 🍑 🍓 | perl -MList::Util=sum -nE 's/ //; say pack "L>", sum(unpack "L>*") / 2'
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+$ echo 🍑 🍓 | ruby -E :UTF-8 -ane 'puts $F.map(&:ord).sum./(2).chr'
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