khulegu's blog

Deleted problem — #571 B
By khulegu, history, 5 years ago, In English

Here is the statement of problem B from the most recent contest (#571) for those who missed it. 571 — B

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5 years ago, # |
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What was the test case 3? I did (a+1) (b+1) /6.

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    5 years ago, # ^ |
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    If I'm not mistaken it likely was 4 4 or something like that.

    Your code would correctly produce 4 for that.

    However the expected answer according to the problem author's code would have been 3 which is clearly wrong as the following arrangement exists :

    1 . 2 2
1 . . .
. . . 4
3 3 . 4
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    5 years ago, # ^ |
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    Hi sir Can you please explain how you achieved that formula? Thank you.

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