LongChallenge(Sep) - Full Editorial

[rajawatlks]

Contest - Contest Page | CodeChef

Problem Name - A Problem on Sticks
Problem Link - CodeChef: Practical coding for everyone
Editorial - TREE2 - Editorial

Problem Name - Ada Matrix
Problem Link - CodeChef: Practical coding for everyone
Editorial - ADAMAT - Editorial - editorial - CodeChef Discuss

Problem Name - Chefina and Swap
Problem Link - CodeChef: Practical coding for everyone
Editorial - CHFNSWAP - Editorial - editorial - CodeChef Discuss

Problem Name - Coronavirus Spread 2
Problem Link - CodeChef: Practical coding for everyone
Editorial - COVID19B - Editorial - editorial - CodeChef Discuss

Problem Name - Find XOR
Problem Link - CodeChef: Practical coding for everyone
Editorial - FINXOR - Editorial - editorial - CodeChef Discuss

Problem Name - Chef and Trump Cards
Problem Link - CodeChef: Practical coding for everyone
Editorial - CRDGAME2 - Editorial - editorial - CodeChef Discuss

Problem Name - Divide Candies
Problem Link - CodeChef: Practical coding for everyone
Editorial - EQDIV - EDITORIAL - editorial - CodeChef Discuss

Problem Name - Rotate the Polyline
Problem Link - CodeChef: Practical coding for everyone
Editorial - ROTATPOL - Editorial

Problem Name - Vibrating Paths (Challenge)
Problem Link - CodeChef: Practical coding for everyone
Editorial - VBR - Editorial - editorial - CodeChef Discuss

Problem Name - Move the Coins 2
Problem Link - CodeChef: Practical coding for everyone
Editorial - MOVCOIN2 - Editorial - editorial - CodeChef Discuss

[rajawatlks]

Video editorial are also available in this

[david_s]

The link for the editorial of Rotate the Polyline is to an uncommented solution, not an editorial. Is there an Editorial for this problem?

[udayan14]

Editorial for Rotate The Polyline missing?

[agentproton]

https://www.codechef.com/viewsolution/37866365
https://www.codechef.com/viewsolution/37728162
look at both the solution ,what you sense is plagairism, many students work hard to get a better rank and now see who is taking all the credits ,the plagger
P.S. He got rank 23 in september challenge

[david_s]

I note that over 100 people scored 700 points in Division 2, solving exactly the same problems. Many of them were 1* or 2*, which makes me suspicious, to say the least. Meanwhile I scored 699.98 points, solving a different set of problems.

[shaded]

I saw the solutions.
Looks like its a fake account, made recently,( for verifying the probs accuracy maybe).

[rahulmysuru7]

https://discuss.codechef.com/t/rotatpol-editorial/77547

[rahulmysuru7]

Because there was a bigger difference in difficulty over 7th and 8th question

[rajawatlks]

Here is the editorial link

ROTATPOL - Editorial

PROBLEM LINK: Practice Div-2 Contest Div-1 Contest Author: tautsjasiunsas Tester: alei_adm Editorialist: tautsjasiunsas DIFFICULTY: MEDIUM-HARD? PREREQUISITES: Geometry, 2-pointers PROBLEM: Given a polyline P, find a direction v such that all indices i with v \cdot (P_{i+1}-P_i) > 0 form a subsegment and none are equal to 0. QUICK EXPLANATION: First, create an array A_i = P_i- P_{i+1}. After, make a vector S storing all A_i, -A_i, (0,1), (0,-1), (1,0), (-1,0). Sort S by polar angle…

[rajawatlks]

[rajawatlks]

how to get such a 6 star rating . Any tips, guide , suggestions etc.

[ssjgz]

In case anyone is confused: ROTATPOL was made Public, but was then made Private again for a while, which is why people couldn’t find it

[rajawatlks]

okay

[sneha_30]

Thanks for help
All Editorial at one place

[david_s]

Yet I found it easy to get some points in VBR, by repeatedly hitting the lowest cost node until it has no edges, but I failed to spot the required combinations in CRDGAME2.

[agentproton]

https://www.codechef.com/viewsolution/37841994
is this also a fake account,just go through all the submissions in the test and you will know about the reality

[rahulmysuru7]

I really need to appreciate you for doing coding even at this age, and you are the only such person I have seen doing coding and actively participating in discuss.Hats off.