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Need help in Codeforces Carrot Cakes

I am having trouble in coming up with a solution for Carrot Cakes. The editorials are provided but I can't understand how do we arrive at such a formula..

asked 24 Jun '18, 16:11

montycs's gravatar image

0★montycs
1057
accept rate: 0%

edited 24 Jun '18, 18:09


let's say we don't build second one.

Then it's just simple to calculate TimeWithoutBuild using formula :

TimeWithoutBuild = ceil(n/k)* t

Now let's build the second and calculate the TimeWithBuild:

as it take d unit time to build, we first add d to TimeWithBuild now we might have already baked some cakes while building the second one. So we need to subtract that cakes from n, so our remaining cakes will be n-(d/t)*k let's say this is n_rem Now our speed of baking is doubled So

TimeWithBuild = d + ceil(n_rem/(2*k)) * t

Now you will be good to code it yourself but nevertheless here is my solution.... Good Luck :p

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answered 24 Jun '18, 20:46

meet2mky's gravatar image

4★meet2mky
2013
accept rate: 28%

Thanks for replying.. Can explain the last part i.e n-(d/t)*k in detail ? I don't get it..

(25 Jun '18, 15:49) montycs0★
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question asked: 24 Jun '18, 16:11

question was seen: 119 times

last updated: 25 Jun '18, 16:07