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Re:既然是upper-left corner is (x1, y1) and lower-right corner is (x2, y2),那位什么会1 <= y1 <= y2 <= n?

Posted by firstdeep at 2016-08-22 20:59:39 on Problem 2155
In Reply To:既然是upper-left corner is (x1, y1) and lower-right corner is (x2, y2),那位什么会1 <= y1 <= y2 <= n? Posted by:IDcard at 2012-01-11 19:13:34
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