Invitation to Dementia 2020 (Rated for Div. 2) on CodeChef

announcement
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37

All numbers will not become 420 after the 3rd step.

1 Like
38

What about this

Prove it wrong

39

@humane Check this Document: solution outlines - Google Docs

41

@dj_r_1 can you please help me out in the 3rd problem. Help required in Problem- BEACIRC (Beautiful Circles)

42

I have already used #define int long long :sweat_smile:

44

You are correct. Answer for N = 7 is 7.
Initially: [1,2,3,4,5,6,7].
Perform (6,7): [1,2,3,4,5,42,42]
Perform (4,5): [1,2,3,20,20, 42,42]
Perform (4,6): [1,2,3,420,20,420,42]
Perform (5,7): [1,2,3,420,420,420,420]
Perform (1,7): [420,2,3,420,420,420,420]
Perform (2,7): [420,420,3,420,420,420,420]
Perform (3,7): [420,420,420,420,420,420,420]

2 Likes
45

It is 420

46

We are looking into this.

2 Likes
47

yep my bad :sweat_smile: :sweat_smile: :pensive: :pensive:

48

When will div1 ranklist be rendered @dj_ ?

49

I had hopes of going to div 1 :pensive:

1 Like
50

Will it be rated ?

51

It should not be otherwise there should be a rejudge

2 Likes
53

Will you please look at my code once… I cannot spot the error in this.https://www.codechef.com/viewsolution/36691206

54

I don’t know how to solve this

55

When will the ratings be updated?wasn’t a good one for me so just curious to see how much i got dropped.

56

After long , it is written in announcement section of the contest

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Answer for N = 7 is 7.
Initially: [1,2,3,4,5,6,7].
Perform (6,7): [1,2,3,4,5,42,42]
Perform (4,5): [1,2,3,20,20, 42,42]
Perform (4,6): [1,2,3,420,20,420,42]
Perform (5,7): [1,2,3,420,420,420,420]
Perform (1,7): [420,2,3,420,420,420,420]
Perform (2,7): [420,420,3,420,420,420,420]
Perform (3,7): [420,420,420,420,420,420,420]
Yes there should be a rejudge

58

Please do not rank participants on the basis of the other 4 problems. In winning strategy, my comment went unanswered (it still is). I asked if the same number can be picked multiple times (because it was CLEARLY mentioned that we can pick any number). Due to this, I got WA. Although a change was made (I don’t know when), I had to assume that you cannot pick the same number multiple times, which was not mentioned anywhere in the statement and I got AC. You can’t just update it in the announcements thinking that we will keep checking. We have a RATED contest to focus on. For such an easy problem, the weak statement forced me to waste a lot of time deciding what assumptions I should make. I also had to constantly check the comments section. For a problem that can easily be solved in 5 minutes with zero penalties, I solved it in 32 minutes with 1 penalty. It will be extremely unfair for my rating to decrease due to inaccuracies in your end. Please take this into consideration.

2 Likes
59

Also making the ranklist on the basis of the other four problems is extremely unfair to people who spent a lot of time thinking on the second question.

2 Likes