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  1.  
  2. def gen()
  3.     a = rand(20)
  4.     b = rand(20)
  5.     c = rand(20)
  6.     [a, b, c]
  7. end    
  8.  
  9. def sol(tc)
  10.     ss = tc.zip(0..2).sort
  11.     if ss[0][0]+ss[1][0] < ss[2][0] / 2
  12.         "Impossible"
  13.     else
  14.         ans = []
  15.         while ss[2][0] > 0
  16.             e = [2, ss[2][0]].min
  17.             ss[2][0] -= e
  18.             ans << "ABC"[ss[2][1]] * e
  19.             ans << ""
  20.         end
  21.         i = 1
  22.         2.times do |k|
  23.             while ss[k][0] > 0
  24.                 ans[i] += "ABC"[ss[k][1]]
  25.                 ss[k][0] -= 1
  26.                 i += 2
  27.                 i = 1 if i >= ans.size
  28.             end
  29.         end
  30.         ans*""
  31.     end
  32. end
  33.  
  34. 20.times do
  35. 	puts "------"
  36.     tc = gen
  37.     puts tc.to_s
  38.     ans = sol(tc)
  39.     puts ans
  40.     puts [ans.count('A'), ans.count('B'), ans.count('C')].to_s
  41.     puts ans.each_char.each_cons(3).all?{|s|s.uniq.size!=1}
  42. end
  43.  
  44.  
Success #stdin #stdout 0s 28216KB
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Standard input is empty
stdout
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------
[9, 19, 5]
BBCABBCABBCABBCABBCBBABBABBABBABA
[9, 19, 5]
true
------
[15, 11, 15]
CCBBAACCBBAACCBBACCBAACCBAACCBAACCBAACBAA
[15, 11, 15]
true
------
[13, 13, 3]
BBCAABBCAABBCABBAABBAABBAABAA
[13, 13, 3]
true
------
[7, 15, 17]
CCABBCCABBCCABBCCABBCCABCCABCCABCCBBCBB
[7, 15, 17]
true
------
[4, 13, 19]
CCABCCABCCABCCABCCBBCCBBCCBBCCBCCBCB
[4, 13, 19]
true
------
[19, 6, 19]
CCBAACCBAACCBAACCBAACCBAACCBACCAACCAACCAACAA
[19, 6, 19]
true
------
[17, 0, 7]
Impossible
[0, 0, 0]
true
------
[11, 3, 1]
Impossible
[0, 0, 0]
true
------
[17, 12, 0]
AABBAABBAABBAABAABAABAABAABAB
[17, 12, 0]
true
------
[16, 8, 5]
AACBAACBAACBAACBAACBAABAABAAB
[16, 8, 5]
true
------
[11, 11, 2]
BBCAABBCABBAABBAABBAABAA
[11, 11, 2]
true
------
[17, 4, 0]
Impossible
[0, 0, 0]
true
------
[7, 11, 6]
BBCAABBCABBCABBCABBCABCA
[7, 11, 6]
true
------
[14, 13, 19]
CCBBACCBBACCBBACCBAACCBAACCBAACCBAACCBACCBACBA
[14, 13, 19]
true
------
[12, 6, 3]
AACBAACBAACBAABAABAAB
[12, 6, 3]
true
------
[6, 8, 15]
CCABCCABCCABCCABCCABCCABCCBCB
[6, 8, 15]
true
------
[15, 17, 18]
CCAABBCCAABBCCAABBCCAABBCCAABBCCAABCCABBCCABBCCABB
[15, 17, 18]
true
------
[8, 12, 18]
CCABBCCABBCCABCCABCCABCCABCCABCCABCCBB
[8, 12, 18]
true
------
[6, 5, 13]
CCBACCBACCBACCBACCBCCACA
[6, 5, 13]
true
------
[4, 17, 15]
BBACCBBACBBACBBACBBCCBBCCBBCCBBCCBCC
[4, 17, 15]
true
https://ideone.com/JMcZYk
language:
Ruby (ruby 2.5.5)
created:
4 years ago
visibility:
public

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