Another suspicious codes from North Korea (IndiaHacks E)

#	User	Rating
1	tourist	3985
2	jiangly	3814
3	jqdai0815	3682
4	Benq	3529
5	orzdevinwang	3526
6	ksun48	3517
7	Radewoosh	3410
8	hos.lyric	3399
9	ecnerwala	3392
9	Um_nik	3392

#	User	Contrib.
1	cry	169
2	maomao90	162
2	Um_nik	162
4	atcoder_official	161
5	djm03178	158
6	-is-this-fft-	157
7	adamant	155
8	awoo	154
8	Dominater069	154
10	luogu_official	150

These are the codes for problem E by RNS_JKS and blackEarth from last IndiaHacks contest.

http://codeforces.net/contest/653/submission/16811842

http://codeforces.net/contest/653/submission/16815024

You can easily discover the simillarities between those competitor's code. Actually, It's more hard to find the difference.

Struct names are different — one has "xvalue", other has "dat". but operator definition / initializators are all same.
Function names are different — one has "doit", other has "foo". but, inside the function, everything is same — even the indentations / spaces are same, too!
Several brackets / indentations are different in main function, but others are identical.

Another interesting thing is the submission from RNS_JKS one minute before AC — http://codeforces.net/contest/653/submission/16814808 This code is very different from the AC code. Then, how are these changes made in such a short time?

In usual competition, I don't go deeper to other's codes. But, when I discovered that my rating was right before IGM (2599), and reminded how I got red from 2199, I was really tempted to write this post! MikeMirzayanov, can you investigate into those issues?

	Rev.	Lang.	By	When	Δ	Comment
	en1		ko_osaga	2016-03-19 18:52:08	1466	Initial revision (published)

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en1

ko_osaga

2016-03-19 18:52:08

1466

Initial revision (published)

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