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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: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 因为x1,x2指的是行号，y1,y2指的是列号~ Followed by: Post your reply here: |
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