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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？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 > RT Followed by:
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