問題:http://nabetani.sakura.ne.jp/hena/ord14crosscircle/
解答例:http://qiita.com/Nabetani/items/66806c9dc14a96f2fd42
def count f, b
cnt = 0
f.chars do |ff|
b.chars do |bb|
cnt+=1 if ff==bb
end
end
cnt
end
def calc src
dst = 0
src.size.times do |i|
(i+1..src.size).each do |j|
dst += count src[i+1, j-i-1] , src[j+1, src.size-j-1] + src[0, i] if src[i]==src[j]
end
end
dst/2
end
DATA.each do |data|
n, s, r = data.split
d = calc s
puts "ng:#{n} #{d} != #{r}" unless d==r.to_i
end
__END__
0 aabbca1bcb 14
1 111ZZZ 0
2 v 0
3 ww 0