### CheaterExposer69's blog

By CheaterExposer69, history, 21 month(s) ago,

The contest is not even over yet! And the cheaters are spoiling this place every day. They completely spoiled CodeChef. I stopped doing CodeChef for these people. Now they are killing Codeforces too.
These screenshots doesn't help about building any idea about the problem solution. I cropped them as the contest is not over yet.

• +56

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 » 21 month(s) ago, # |   -167 They did a great job, this is another trash contest anyways
•  » » 21 month(s) ago, # ^ |   +2 Why is it?
•  » » » 21 month(s) ago, # ^ |   -133 Problem B was pure guessing, another meaningless constructive problem, without any proofs
•  » » » » 21 month(s) ago, # ^ |   +45 It is certainly not Pure Guessing! Wait for the editorial before you can say such stuff! But if you want the intuition: You want to maximize the Sum of the LCMS. This means that you don't want any loss of TOTAL SUM in the form of COMMON FACTORS! For Numbers with No Common Factors(Co-Prime Numbers), LCM is their PRODUCT! Hence, you would want to pick up Co-Prime numbers together. Any TWO Consecutive Integers are Co-Prime with each other(Think about it, or look it up)! Now, the reason for Grouping the Largest Numbers with their Neighbours together has to do with The below two facts: They are Co-Prime with their neighbors. LCM is the Product and no loss in TOTAL SUM. The largest numbers are grouped together. We are looking at the Sum of Products here. Say you have a set of Resources (1,2,3,...10) and A magical power to Multiply every resource with a Multiplier each chosen from (a, b, c, d, ... j). Assume Multipliers are in sorted order. If you want to maximize your Total resources, you will GREEDILY choose to give your largest Resource the Biggest Multiplier and so on! It is the same idea for this problem, to group the largest numbers together for the product, to Maximize the Sum of Products!
•  » » » » » 21 month(s) ago, # ^ |   -36 I looked to its tutorial. Since you think it's a "good" problem, why don't you explain its formal solution ?
•  » » » » » 21 month(s) ago, # ^ |   +63 Lol, you decide to make a spontaneous emotional tutorial for that guy, very nice
•  » » » » » » 21 month(s) ago, # ^ |   +17 Haha!
 » 21 month(s) ago, # |   -10 I think, if someone has the same code (not include emptiness) as someone, need to remove him from competition.
•  » » 21 month(s) ago, # ^ |   +10 A+B problem, or something with similar length as that.
 » 21 month(s) ago, # |   +6 How does writing this helps in fighting plagiarism? On the contrary, now many other cheaters know where to look for solutions during the contests.
•  » » 21 month(s) ago, # ^ |   +2 It doesn't. But As a general user I don't know how else I can contribute to stop plagiarism. If you have any better idea to stop this thing as an user you are welcome to share those ideas with us (me).
•  » » » 21 month(s) ago, # ^ |   +14 Yet you can simply post the code for Div2 A and submit it yourself, and the next day you'll get a list of cheaters in your email inbox, lamentably.
 » 21 month(s) ago, # |   +4 Link to the telegram group plx
 » 21 month(s) ago, # |   +1 Hope they all enter into div 1 and leave div 2 clean xd
•  » » 21 month(s) ago, # ^ |   +1 as a div1 participant, please no...
 » 21 month(s) ago, # |   -6 Tell me the group link. Asking for a friend. Of course the friend wants to report the group.
•  » » 21 month(s) ago, # ^ |   +4 Good luck to your friend.
 » 21 month(s) ago, # |   +7 what is the usage of cheating ? Will it make that person better in CP or will it make that person more addicted to cheating in the future ? Solve a problem with rating 800 by your own, I guarantee it's more fun than copying someone else's code for a problem with rating 2000, that's all i want to say. (sorry for the bad English)
•  » » 21 month(s) ago, # ^ |   0 Well said. Totally agreed
•  » » 21 month(s) ago, # ^ |   +8 It is said that Indians attach great importance to the rating of codeforces and codechef, and it is lamentable that where there is interest, there is deception.
•  » » » 21 month(s) ago, # ^ |   +4 I feel like it is students who are attaching great importance to their codeforces/codechef rating but in the end it's their performance in the interview that counts and not rating.
•  » » » » 21 month(s) ago, # ^ |   0 Some people think that ratings will help them get jobs and they put lots of emphasis into that
 » 21 month(s) ago, # |   -15 They did a great job, this is another trash contest anyways
•  » » 21 month(s) ago, # ^ |   +1 trash because you didn't perform well?
•  » » 21 month(s) ago, # ^ |   0 Please don't judge the competition because of your lack of personal ability.Some 'infants' are really outspoken.
•  » » » 21 month(s) ago, # ^ |   0 Who are you to judge me?