This user neophd is seriously annoying, now he pretends to be from China, and he's posting the judge's solution in TEXT format for some problems:
This really makes me lose motivation, please expel this scum.
This user neophd is too cheeky. His action(pretending to be a Chinese user) will lose credits of our Chinese users. BTW, the user name he pretend is really the name of a Chinese ACMer from Zhejiang Univ.
Please ban this user id and delete all his submissions.
After my last (very long) comment about cheating and the recent stream of submissions by neophd (as I write he is calling himself Neo) I am feeling very, very naive...
(Edit: my original message was partially destroyed after the word "naive". I don't remember how it ended)
This whole discussion continued in the Brazillian forum, at SPOJ Brazil. For those that speak portuguese:
br.spoj.pl/forum/viewtopic.php?t ... sc&start=020
It seems that neophd has finally got our point. He started a new account where he promises to submit only honest solutions.
I'm willing to believe him. I know that this is the second time I do so, and in the first time I got very disappointed, but this time he communicated his decision directly into our forum.
I still would like to see his previous account erased, and probably so do he (unless, of course, he doesn't have an archive of his honest solutions), but I wish his new account will show his real potential and provide him some real fun.
Carlos
P.S. - I do believe that naÄ
(EDIT: again, the word "naive" truncated my message...)
Carlos, just point him to this: spoj.pl/forum/viewtopic.php?t=26451
as an example of honest attitude to the contest, from my compatriot Ivan Metelsky, a very talented programmer, member of our national team.
6 months later
These days a user whose id is "obama" has submitted many stardard programs. Actually I want to delete his submissions or have him blacklisted...
29 days later
15 days later
User nkvuong is cheating at vietnamese online judge ( vn.spoj.pl/8)
He submitted many solutions on the web (he also change variable names, function names, and many things else to make it more difficult for admins and problem setters to know that), output data for test cases that he could not solve, and even add difficult problems in vietnamese online judge to spoj to collect solutions and submit them:
vn.spoj.pl/problems/QBFLOWER/58 (he just submitted blue mary's solution)
vn.spoj.pl/problems/MILITARY/14
vn.spoj.pl/problems/GCDSUM/5
vn.spoj.pl/problems/SCIRCLE/4
vn.spoj.pl/problems/PALINX/3
vn.spoj.pl/problems/BOSS/4
It's easy to see that right after someone get accept on spoj, he submit in vietnamese online judge (this explain why he rejudged problem GCDEX to make solutions that he can't use get TLE (the problem GCDSUM in vietnamese online judge has really strict time limit so he couldn't use many accepted code in spoj)) and why he was willing to give test cases of problem VCIRCLES on spoj (he deleted his comment under the problem when he got accepted in vietnamese online judge)
Can spoj admins do anything about this?
Here are some of nkvuong's interesting code to prove what I said. There are many more cheating code (sorry, I don't know how to post code)
submission 2081178
var n:integer;
f:array[1..4000] of string;
begin
f[1157]:='59310955574174378025143';
f[1158]:='608738499757149308420461';
f[1159]:='624772964943249389853921';
f[1160]:='641222772712946666232159';
f[1161]:='658098503325620557703531';
f[1162]:='675411002095367948226792';
f[1163]:='693171385921368804266503';
f[1164]:='71139149976492178207743';
f[1165]:='730081674557913935063085';
f[1166]:='749255232103605934739479';
f[1167]:='768923994378646785063103';
f[1168]:='789100539835396883939357';
f[1169]:='809797761151675117596505';
f[1170]:='831028872951171360193205';
f[1171]:='85280741971042867086399';
f[1172]:='875147283856825592496127';
f[1173]:='898062694062109480753151';
f[1174]:='921568233736104125879807';
f[1175]:='945678849725365687304481';
f[1176]:='97040986122163883222045';
f[1177]:='995776968885089512945407';
f[1178]:='1021796264187423103783033';
f[1179]:='104848423898007434502441';
f[1180]:='1075857795292827120414039';
f[1181]:='1103934255368313170878195';
f[1182]:='1132731371937969551486879';
f[1183]:='1162267338745180573579677';
f[1184]:='1192560801321446407655743';
f[1185]:='1223630868021565282662399';
f[1186]:='125549712132395373058651';
f[1187]:='1288179629402366802651719';
f[1188]:='1321698957975444222097689';
f[1189]:='1356076182440620738701165';
f[1190]:='1391332900299137403659864';
f[1191]:='1427491243879009512858099';
f[1192]:='1464573893362984956103679';
f[1193]:='150260490128684565788671';
f[1194]:='1541605650408283495393521';
f[1195]:='1581602979275263415146495';
f[1196]:='162262184965939854852515';
f[1197]:='1664685593543647485026457';
f[1198]:='1707822763913648832465553';
f[1199]:='1752059503197018682676295';
f[1200]:='1797423382471947368620319';
readln(n);
writeln(f[n]);
end.
He did this many times to find informations about input data
submission 2169477
include
include
using namespace std;
int ________, zzzzzzzzzzzzzzzzzz;
struct bxyz134 {
short r, s;
bxyz134() {}
bxyz134( int rr, int ss ) { r = rr; s = ss; }
int z_z_z_z() { return r >= 0 && r < ________ && s >= 0 && s < zzzzzzzzzzzzzzzzzz; }
friend bxyz134 operator + ( const bxyz134 &a, const bxyz134 &b ) {
return bxyz134( a.r + b.r, a.s + b.s );
}
};
bxyz134 zz__zzz1, zz__zzz2;
char z_z[1500][1500];
char z_z_z_z_z[1500][1500];
char __zz[1500][1501];
queue zz__zzz_to__zz__zz__, zz__zzz__z___zz___zz__zz__;
queue zz___to__zz__zz__, zz____z___zz___zz__zz__;
int main() {
scanf( "%d%d", &________, &zzzzzzzzzzzzzzzzzz );
int num = 0;
for( int r = 0; r < ________; ++r ) {
scanf( "%s", __zz[r] );
for( int s = 0; s < zzzzzzzzzzzzzzzzzz; ++s ) {
if( __zz[r][s] == 'L' ) {
if( ++num == 1 ) zz__zzz1 = bxyz134( r, s );
else zz__zzz2 = bxyz134( r, s );
__zz[r][s] = '.';
}
if( zz[r][s] == '.' ) { z_z_z_z_z[r][s] = 1; zz____z___zz___zzzz__.push( bxyz134( r, s ) ); }
}
}
const bxyz134 zz___zzz[4] = { bxyz134( -1, 0 ), bxyz134( 0, 1 ), bxyz134( 1, 0 ), bxyz134( 0, -1 ) };
zz__zzz__z___zz___zz__zz__.push( zz__zzz1 );
z_z[zz__zzz1.r][zz__zzz1.s] = 1;
int zzzz__;
for( zzzz__ = 0; !z_z[zz__zzz2.r][zz__zzz2.s]; ++zzzz__ ) {
for( ; !zz__zzz__z___zz___zz__zz__.empty(); zz__zzz__z___zz___zz__zz__.pop() ) zz__zzz_to__zz__zz__.push( zz__zzz__z___zz___zz__zz__.front() );
for( ; !zz____z___zz___zz__zz__.empty(); zz____z___zz___zz__zz__.pop() ) zz___to__zz__zz__.push( zz____z___zz___zz__zz__.front() );
for( ; !zz___to__zz__zz__.empty(); zz___to__zz__zz__.pop() ) {
bxyz134 a = zz___to__zz__zz__.front();
__zz[a.r][a.s] = '.';
for( int d = 0; d < 4; ++d ) {
bxyz134 b = a+zz___zzz[d];
if( !b.z_z_z_z() || z_z_z_z_z[b.r][b.s] ) continue;
z_z_z_z_z[b.r][b.s] = 1;
zz____z___zz___zz__zz__.push( b );
}
}
for( ; !zz__zzz_to__zz__zz__.empty(); zz__zzz_to__zz__zz__.pop() ) {
bxyz134 a = zz__zzz_to__zz__zz__.front();
for( int d = 0; d < 4; ++d ) {
bxyz134 b = a+zz___zzz[d];
if( !b.z_z_z_z() || z_z[b.r][b.s] ) continue;
z_z[b.r][b.s] = 1;
if( __zz[b.r][b.s] == '.' ) zz__zzz_to__zz__zz__.push( b );
if( __zz[b.r][b.s] == 'X' ) zz__zzz__z___zz___zz__zz__.push( b );
}
} }
printf( "%d\n", zzzz__-1 );
return 0;
}
He changed variable names into something unimagineable after I reported what he's been doing to VOJ admins (and he still denied what he's been doing until now). But it is still easy to see that this is still Croatian code that can easily be found on hsin.hr/15
Last month he was able to get to rank 1 of vietnamese online judge for about two or three days. I think SPOJ admins should do something about this.
thanks!
it looks he was cheating,
he is temporarily banned (no access to SPOJ system), after we carefoully look into it, we decide what to do.
As I can see he is no longer on the sphere online judge ranking, and his user page at spoj is empty. Was his submission deleted?
But his user page at vietnamese online judge is NOT empty. Does this mean he can still access to vietnamese online judge?
And the most important is that his rank at VOJ system hasn't been eliminated yet. (his rank is now 3, but several weeks ago he got the first rank for about 3 days.)
There've been so many complaints about this annoying user and I think you should execute a strict and clear judgement. 
14 days later
-_-
Today I've found that user "suby" did the same thing as posted above. He has been rank #2 at SPOJ for a very long time.
Here are some interesting code:
Problem ANALYSER. submission id 1326682:
This code looks pretty nice, but when I pull the scroll bar to the right:
The same things can be found in these submissions too:
Problem RP. id: 1344111
Problem LARGE. id: 1602571
Problem BACKUP. id: 930772
These are not only things he even does. After submitting cheating program and has been rejected by my own test cases on problem BACKUP, he submits my classmate g201513's program. At that time, the password of my classmates' account @ SPOJ only has 6 digits and is easy to decrypt by brute-force. Maybe this is the reason why suby gets almost all g201513's program @ SPOJ.
See these submissions on my problems:
Problem Code submission id Original Author submission id
BACKUP 1260794 g201513 855371
BARB 1207079 g201513 836398
DRAGON 1260732 lcosvse 836529
DRAGON2 1260277 lcosvse 1003477
GEN2 1300074 g201513 1003443
GSS2 1301723 g201513 858682
MINDIST 1248964 g201513 1116322
PROFIT 1207304 g201513 1207070
SEQ2 1325178 g201513 836309
Only to my hard problems, he submitted so many cheating programs, one can image that many of his submissions is cheating ones.
Obviously, suby can not finish these problems himself. These actions are cheeky.
By the way, user ---(login: neophd) has been banned a long time ago. But his name is still shown on the ranklist. So would the admins please kick out these two persons from the ranklist? Thanks.
Well, cheating needs to defined too.
Many people cannot solve the spoj problems, they ask hint/solution in spoj/topcoder forums. Then they submit the solution and get accepted. Is this cheating ?
I however, like to solve problems myself. So i rarely ask hint but when I get stuck ( too much wa/tle ), i see my friend's code who have solved the problem, then change my program accordingly. Is this cheating ? 
I once downloaded a solution from IPSC and submitted it in the spoj system. But I know how the solution works, is this considered cheating ?
I think the only person who losses is the cheater himself. 
But obvious cheaters like suby/neophd should be handled strictly.
