Comments
On Okrut → Good Bye 2020, 5 years ago
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Can Someone explain problem D ?
On Anadi → Good Bye 2020 Editorial, 5 years ago
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I did kinda same

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Okay
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Yeah Thats what I am saying. In have a range mx and mn fof last second fence bcz it can move. I just wanna check for last fence it it can be somewhere between this range.
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In problem C, suppose the last fence's ground level is Hn. Why can't Hn be between(inclusive) [mn[n-1]-(k-1),mx[n-1]+k-1]
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what if the Hn is higher tan r[n-1]+k-1 ?
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Yeah, I just checked. Great
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Thanks, well explained! But I wonder why were you changing array elements(except p1&p2) in your solution which I guess was not required. Any reason? (Just curious)
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What about problem H