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求一道题的题号

Posted by hbuHappyHe at 2010-03-03 10:11:16 
记得oj上好像有这么一道题，就是给了很多数，又给了个值，问那堆数两两相加不超过这个值的有多少对？
谁知道这题的题号，发站内信告诉我题号就行了，谢谢！
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