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オフラインリアルタイムどう書くF03の問題をrubyで解く

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def solve(q)
  x,y,z = q.split('').map{|e| e.ord - 97}.sort
  return 'J' if (x+4 == y && x+5 == z && y/5 == z/5)
  return 'L' if (x+5 == y && x+6 == z && y/5 == z/5)
  return 'T' if (x+1 == y && x+6 == z && x/5 == y/5)
  return 'R' if (x+1 == y && x+5 == z && x/5 == y/5)
  return 'I' if (x+5 == y && x+10 == z && x%5 == y%5 && x%5 == z%5)
  return 'B' if (x+1 == y && x+2 == z && x/5 == y/5 && x/5 == z/5)
  '-'
end

DATA.readlines.each do |line|
  no,q,a,_ = line.strip.split(/\s+/)
  ans = solve(q)
  print no + "\t" + ans
  puts ans == a ? ' o' : ' x'
end
__END__
0   cba B   
1   yam -   
2   aaa -   
3   def -   
4   gga -   
5   bbf -   
6   gmh T   
7   mhn L   
8   dea -   
9   mrn R   
10  hcm I   
11  mno B   
12  snr J   
13  xnn -   
14  nnl -   
15  kop -   
16  ejd T   
17  txy J   
18  pvu L   
19  baf R   
20  hhc -   
21  ono -   
22  wxv B   
23  bdc B   
24  ojt I   
25  fkp I   
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