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第15回オフラインリアルタイムどう書くの参考問題をPythonで

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詳しくはこちら。

http://qiita.com/Nabetani/items/0b56395d4c9e7c64b230

saihon2013 さんのC言語実装を参考にさせてもらいました。

def search(text, left, right, match):

longer = match
for l in xrange(left, len(text)):
for r in xrange(right, l-1, -1):
if text[l] == text[r]:
m = search(text, l+1, r-1, match + (1 if l==r else 2))
if m > longer: longer = m
break
return longer

def solve(text):
return search(text, 0, len(text)-1, 0)

def test(text, answer):
result = solve(text)
print 'OK' if result==int(answer) else "NG", result, answer, text

if __name__ == '__main__':
0, test( "I_believe_you_can_solve", "9" );
1, test( "a", "1" );
2, test( "aa", "2" );
3, test( "aaa", "3" );
4, test( "ab", "1" );
5, test( "aabb", "2" );
6, test( "ABBA", "4" );
7, test( "Abba", "2" );
8, test( "1234567890", "1" );
9, test( "1234567890987654321", "19" );
10, test( "abcdcba", "7" );
11, test( "0a1b2c3d4c5b6a7", "7" );
12, test( "abcdcba0123210", "7" );
13, test( "abcdcba_123210", "7" );
14, test( "_bcdcba0123210", "7" );
15, test( "abcddcba0123210", "8" );
16, test( "abcdcba01233210", "8" );
17, test( "a0bc1dc2ba3210a", "9" );
18, test( "a0bc1ddc2ba3210", "8" );
19, test( "3a0bc1ddc2ba3210", "10" );
20, test( "11oooo1111o1oo1o111ooooooooooo", "20" );
21, test( "11o1111o1111oo11ooo11111ooo1oo", "20" );
22, test( "111111oo11o111ooo1o1ooo11ooo1o", "21" );
23, test( "11o1o1o11oo11o11oo111o1o1o11oo", "27" );
24, test( "oo111o1o11o1oo1ooo11o1o11o1o1o", "27" );
25, test( "1o1oo11111o1o1oo1o1o1111oo1o1o", "28" );
26, test( "QQooooQooooQQyQoyQQQyyyyQQoyoy", "15" );
27, test( "oQoooQooooQyoyQoyoyyyQQyQQQQoQ", "16" );
28, test( "yyyyyooyQyyyoyyQyyooyQoQoQQoQy", "17" );
29, test( "yyQoyQoyyQyQQoyooooyyQQyQyooQy", "24" );
30, test( "oQQooQoQyQQoyoQQoQyQyQyQoQoooo", "24" );
31, test( "oQQyQQyyQyQQoooyQQyyyQQQyyQQoy", "25" );
32, test( "WAk9iHI4jVDlStyudwTNqE138kwan2", "3" );
33, test( "c43fIu1Mlz0K9hEVOgGcUdbeB5ksa7", "3" );
34, test( "CAbYcW5VqHjzFdIkH_61PM0TsyRuie", "3" );
35, test( "jInQnUvSayrJTsQWujovbbqW0STvoj", "10" );
36, test( "iZDrvpUKgtj3FrZsZ4CLjrEgUdZzQG", "11" );
37, test( "ROgYUOu6er_DA7nB6UGquO1GUHC62R", "11" );
38, test( "Oh_be_a_fine_girl_kiss_me", "9" );
39, test( "8086_6502_6809_Z80", "11" );
40, test( "xcode_visualstudio_eclipse", "11" );
41, test( "word_excel_powerpoint_outlook", "9" );
42, test( "abcdefghijklmnopqrstuvwxyz0123", "1" );