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/*附上一个更强的数据：

Posted by yuanchuanshun at 2010-08-26 10:45:10 on Problem 3067
In Reply To:A得吐血，树状做的居然600+MS 小结一下。。。。 Posted by:yuanchuanshun at 2010-08-26 10:19:11 
/*附上一个更强的数据：
100
3 4 5
1 4
2 4
2 3
3 1
3 2

Sample Output
Test case 1: 7
*/
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