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这题搜索前要剪很多枝才能过,剪到我都哭死了才150多ms

Posted by yuanyirui at 2007-05-31 16:22:25 on Problem 1549
1,正色反色情况都一样,合并要剪 
2,手镯中颜色存在情况要剪枝
3,搜索过的后继颜色将不再搜索要剪

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