18/04/16 22:21:24.15 p2Ysyc3s.net
>>869 Ruby 全探索
A = (1..11).map{|i| i + 1 - i / 7 * 6}
%w[
99999999999? ??9999999999
].each{|s|
puts '', s, '=>'
10.**(s.count(??)).times{|i|
d = "%012d".%(i).chars
m = s.gsub(??){d.pop}.reverse.chars.map(&:to_i)
x = A.zip(m[1, 11]).map{|a, b| a * b}.sum % 11
puts m.reverse.join if (x == 1 ? 0 : -x % 11) == m[0]
}
}
#=>
99999999999?
=>
999999999996
??9999999999
=>
509999999999
619999999999
729999999999
839999999999
949999999999
069999999999
179999999999
289999999999
399999999999