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s=0
gets.chars.each_cons(2).map{|a|i,j=a.map{|e|'123456789.0'.index e}
i&&j&&s+=((i%3-j%3)**2+(i/3-j/3)**2)**0.5}
print s.round(2),'cm'

Success #stdin #stdout 0.01s 7452KB

stdin

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219.45.143.143

stdout

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27.38cm

https://ideone.com/2CIQa5

language:

Ruby (ruby 2.5.5)

created:

visibility:

public

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