| ENG RUS | Timus Online Judge |
Discussion of Problem 1230. Introspective ProgramVladimir Yakovlev (USU) Problem 1230. Introspective Program rejudged // Problem 1230. Introspective Program 23 Dec 2025 03:52 A bug fixed in the checker program that allowed passing arbitrary expressions as a first argument to the substring function. According to the problem statements only variables are allowed to be passed there. Accepted solutions have been rejudged. 26 authors lost the Solved status for the problem. Ade My PIBAS program has only 92 char // Problem 1230. Introspective Program 2 Apr 2023 16:00 such interesting problem Kergan C# - WA1 - Interpreter shows the same string in output, though [1] // Problem 1230. Introspective Program 14 Nov 2022 18:13 I don't use ";" in the end. I use Console.Write() and not Console.WriteLine(). According to the interpreter my PIBAS programm is correct. Still I've got WA#1. I'd like to have some hints from people with C# AC. Kergan Re: C# - WA1 - Interpreter shows the same string in output, though // Problem 1230. Introspective Program 15 Nov 2022 02:55 Disregard that. I don't understand how I checked my program a dozen times and didn't see the obviously wrong length of last substring! Funny thing about the interpreter provided by DR. Zhihua Lai: it does not react to substring length which is higher than the length of an actual string. That's why my PIBAS programm worked well in interpreter but gave me WA1 here. dood Please help me. Why WE? // Problem 1230. Introspective Program 3 Jun 2015 00:29 java public class MainClass { public static void main(String[] args) { System.out.println("A=\"'\";B='A=\"\";B=;?$(B,0,4)+A+$(B,4,4)+A+B+A+$(B,8,37)';?$(B,0,4)+A+$(B,4,4)+A+B+A+$(B,8,37)"); } } Semyon Grendel' Help! Solution [1] // Problem 1230. Introspective Program 23 Dec 2014 20:19 Edited by author 20.09.2022 09:22 Edited by author 20.09.2022 09:22 Semyon Grendel' Re: Help! Solution // Problem 1230. Introspective Program 26 Dec 2014 10:22 All right, Ive done it laughinghao What's the problem mean? [1] // Problem 1230. Introspective Program 9 Aug 2013 21:57 what is the problem's requirement? Межгалактическая Академия Транспневматологии Re: What's the problem mean? // Problem 1230. Introspective Program 14 Aug 2013 13:12 Lual.ru Doctor Lai Online Javascript PIBAS Interpreter here // Problem 1230. Introspective Program 27 Jan 2013 22:48 http://rot47.net/pibas.interpreter.html Now you can check your PIBAS code before submitting to the online judge. I hope this is useful. Khlyzov Andrew Yeah!!! I wrote it! Now, I'm proud of myself [2] // Problem 1230. Introspective Program 2 Aug 2004 00:33 Do you agree this is a very interesting problem? I like writing such problems very much! null Re: Yeah!!! I wrote it! Now, I'm proud of myself [1] // Problem 1230. Introspective Program 11 Sep 2004 20:44 I've done it! 1230 is among the most interesting problems i've ever solved! Imho, it's one of the best on timus. tyomitch Re: Yeah!!! I wrote it! Now, I'm proud of myself // Problem 1230. Introspective Program 23 Jan 2013 23:12 Cool! Mine is only 143 chars long =) gufy An algorythm?(+) [5] // Problem 1230. Introspective Program 14 Nov 2002 13:40 Please, could you shortly tell me an algo of a introspective program? In any language:-) asif Me also. An algorithm for any language? [2] // Problem 1230. Introspective Program 14 Nov 2002 14:51 ronobe (aka oberon) Example of an introspective program on Pascal (+) [1] // Problem 1230. Introspective Program 16 Nov 2002 13:38 Here is my variant of an introspective program. It is written on Pascal. I think it will not be hard to convert it to C/C++ But I do not think it is easy make same under PIBAS, because PIBAS does not have for/while cycles :(. Some explanations: 1. Every const string (Stgs[ 2] := '...') Has " symbol not ' because Pascal needs doubled '' to mark single ' inside strings. 2. Chr(34) = ' 3. Chr(39) = " ----- Cut here ----- program IntrospectiveProgram; var Stgs: array[1..20] of String; i, j: Integer; begin Stgs[ 1] := ''; Stgs[ 2] := ' WriteLn("program IntrospectiveProgram;");'; Stgs[ 3] := ' WriteLn("var");'; Stgs[ 4] := ' WriteLn(" Stgs: array[1..20] of String;");'; Stgs[ 5] := ' WriteLn(" i, j: Integer;");'; Stgs[ 6] := ' WriteLn;'; Stgs[ 7] := ' WriteLn("begin");'; Stgs[ 8] := ''; Stgs[ 9] := ' for i := 1 to 20 do'; Stgs[10] := ' WriteLn(" Stgs[",i:2,"] := """, Stgs [i], """;");'; Stgs[11] := ' WriteLn;'; Stgs[12] := ''; Stgs[13] := ' for i := 1 to 20 do'; Stgs[14] := ' for j := 1 to Length(Stgs[i]) do'; Stgs[15] := ' if Stgs[i][j] = Chr(34) then'; Stgs[16] := ' Stgs[i][j] := Chr(39);'; Stgs[17] := ''; Stgs[18] := ' for i := 1 to 20 do'; Stgs[19] := ' WriteLn(Stgs[i]);'; Stgs[20] := 'end.'; WriteLn('program IntrospectiveProgram;'); WriteLn('var'); WriteLn(' Stgs: array[1..20] of String;'); WriteLn(' i, j: Integer;'); WriteLn; WriteLn('begin'); for i := 1 to 20 do WriteLn(' Stgs[',i:2,'] := ''', Stgs[i], ''';'); WriteLn; for i := 1 to 20 do for j := 1 to Length(Stgs[i]) do if Stgs[i][j] = Chr(34) then Stgs[i][j] := Chr(39); for i := 1 to 20 do WriteLn(Stgs[i]); end. ---- And here ---- gufy Thank you very much. // Problem 1230. Introspective Program 16 Nov 2002 19:45 > Here is my variant of an introspective program. It is written on > Pascal. I think it will not be hard to convert it to C/C++ > But I do not think it is easy make same under PIBAS, because > PIBAS does not have for/while cycles :(. > > Some explanations: > 1. Every const string (Stgs[ 2] := '...') Has " symbol not ' > because Pascal needs doubled '' to mark single ' inside strings. > 2. Chr(34) = ' > 3. Chr(39) = " > > ----- Cut here ----- > program IntrospectiveProgram; > var > Stgs: array[1..20] of String; > i, j: Integer; > > begin > Stgs[ 1] := ''; > Stgs[ 2] := ' WriteLn("program IntrospectiveProgram;");'; > Stgs[ 3] := ' WriteLn("var");'; > Stgs[ 4] := ' WriteLn(" Stgs: array[1..20] of String;");'; > Stgs[ 5] := ' WriteLn(" i, j: Integer;");'; > Stgs[ 6] := ' WriteLn;'; > Stgs[ 7] := ' WriteLn("begin");'; > Stgs[ 8] := ''; > Stgs[ 9] := ' for i := 1 to 20 do'; > Stgs[10] := ' WriteLn(" Stgs[",i:2,"] := """, Stgs > [i], """;");'; > Stgs[11] := ' WriteLn;'; > Stgs[12] := ''; > Stgs[13] := ' for i := 1 to 20 do'; > Stgs[14] := ' for j := 1 to Length(Stgs[i]) do'; > Stgs[15] := ' if Stgs[i][j] = Chr(34) then'; > Stgs[16] := ' Stgs[i][j] := Chr(39);'; > Stgs[17] := ''; > Stgs[18] := ' for i := 1 to 20 do'; > Stgs[19] := ' WriteLn(Stgs[i]);'; > Stgs[20] := 'end.'; > > > WriteLn('program IntrospectiveProgram;'); > WriteLn('var'); > WriteLn(' Stgs: array[1..20] of String;'); > WriteLn(' i, j: Integer;'); > WriteLn; > WriteLn('begin'); > > for i := 1 to 20 do > WriteLn(' Stgs[',i:2,'] := ''', Stgs[i], ''';'); > WriteLn; > > for i := 1 to 20 do > for j := 1 to Length(Stgs[i]) do > if Stgs[i][j] = Chr(34) then > Stgs[i][j] := Chr(39); > > for i := 1 to 20 do > WriteLn(Stgs[i]); > end. > ---- And here ---- morbidel Here's a C Quine :-) [1] // Problem 1230. Introspective Program 9 Dec 2002 00:13 char *f = "char *f = %c%s%c; void main(){printf(f, 34, f, 34, 10);%c" void main() { printf(f, 34, f, 34, 10); } marqueewinq@mipt Another idea // Problem 1230. Introspective Program 5 Nov 2011 03:43 The main point of my solution is, firstly, to become free of constant non-variable strings in output and, secondly, to use substring operator to replicate print. Let's define double quote as D, and single quote as S, sembol of endline as E: {{{ D='"';S="'";E=";" }}} After defining that, we need to print that string. Let's use support string C: {{{ C="C=D=S=E="; ... ?$(C,1,2)+D+C+D+E #printed definition of C +$(C,3,2)+S+D+S+E #printed definition of D ... #print the rest alike }}} But how we'll print this particular "?" operation? Let's append all that operator body to our support string C, and then print it's substring, which will represent needed operator: {{{ C="C=D=S=E=?$(C,1,2)+D+C+D+E+$(C,3,2)+S+D+S+E+$(C,5,2)+D+S+D+E+$(C,7,2)+D+E+D+E+$(C,9,78)"; }}} You can simply prove by yourself, that this substring is 78 symbols long. Thus, solution found. My full PIBAS code is 187 lines long. Edited by author 05.11.2011 03:44 Edited by author 05.11.2011 03:44 cartman Let's make is shorter! [3] // Problem 1230. Introspective Program 7 May 2005 22:56 My PIBAS-program consists of 219 letters. Please, if you have shorter, share your program with me! ICh(USU) Re: Let's make is shorter! [1] // Problem 1230. Introspective Program 4 Jun 2005 23:42 My PIBAS Introspective program is 99 bytes long. Vladimir Yakovlev (USU) Re: Let's make is shorter! // Problem 1230. Introspective Program 5 Jun 2005 03:32 My own solution is 89 chars long. The best known solution is 65 chars long. marqueewinq@mipt Re: Let's make is shorter! // Problem 1230. Introspective Program 5 Nov 2011 03:29 As for me, i've got OK for 187 chars in code Tolstobrov Anatoliy[Ivanovo SPU] somebody can help? [2] // Problem 1230. Introspective Program 20 Feb 2006 02:25 Why i got Wa? Pascal [deleted] PIBAS [deleted] I write program for test my program and input and output not diffrence. \ SOS / Thank you I got AC. Hint for all Begin WriteLn('<PIBAS Code>'); End. This incorrect Begin Write('<PIBAS Code>'); End. This Correct. Edited by author 20.02.2006 21:11 GaLL Re: somebody can help? // Problem 1230. Introspective Program 20 Feb 2006 11:32 Try the same without ';' in the end. There is strange thing, but program with ending ';' is incorrect. AterLux Re: somebody can help? // Problem 1230. Introspective Program 5 May 2011 20:26 WriteLn is correct and can take AC Igor Mihajlovic plz help!!!!!!!!!!!! [1] // Problem 1230. Introspective Program 26 Jul 2008 23:11 this is my c++ program and i dont know why i get WA #include <iostream.h> main() { cout<<"D='\"';J=\"'\";S=\"D=\"+J+D+J+\";J=\"+D+J+D+\";S=?$(S,1,14);?D;?'D=';?D;?'+';?'J';?'+';?'D';?'+';?'J';?'+';?D;?';J=';?D;?'+';?'D';?'+';?'J';?'+';?'D';?'+';?D;?$(S,12,146);?D;?";";?$(S,15,143);\";?$(S,1,14);?D;?'D=';?D;?'+';?'J';?'+';?'D';?'+';?'J';?'+';?D;?';J=';?D;?'+';?'D';?'+';?'J';?'+';?'D';?'+';?D;?$(S,12,146);?D;?";";?$(S,15,143);"; } AterLux Re: plz help!!!!!!!!!!!! // Problem 1230. Introspective Program 5 May 2011 20:24 better write PIBAS code only. try to write PIBAS interpreter, it will show your error at once. in your PIBAS code (thats begins after cout<<" and when \" replaced with ") at position 170 unexpected " there are doubled "; ...?D;?";";?$(S,15,143);... ^^^^^ here you shall replace one of quotes with some other simbol cherudim For anybody who wa // Problem 1230. Introspective Program 24 Sep 2009 19:32 1.You can't use ';' at the end of the program 2.You can't use space in the pro except in " " or ' '! Hope it will be helpful for you! cherudim NO problen can be more interesting than it // Problem 1230. Introspective Program 24 Sep 2009 19:28 Though I spent lot of time on it ,but it give me so much fun that I could never forget it!!! WinAsAlways Please help me!!! [1] // Problem 1230. Introspective Program 24 Jul 2008 15:35 thanx a lot Edited by author 19.04.2010 08:32 198808xc Re: Please help me!!! // Problem 1230. Introspective Program 26 Aug 2008 12:04 It failed because the invalid definition of B. You can't use a " between a pair of ", but only between a pair of '. So you can change it to : B='"'. But this cause another bug, for you must output triple B in A. So, try to add a new variable C, C="'", and change the program a bit, and you will get AC. Good luck~ Ilya Patskalyov Why this program is not correct [2] // Problem 1230. Introspective Program 6 Mar 2006 06:48 Why this program is not correct: PIBAS: A="""; B="B=;?'A='+A+A+A+';'+$(B,1,2)+A+B+A+$(B,3,41)"; ?'A='+A+A+A+';'+$(B,1,2)+A+B+A+$(B,3,41) Pascal: [code deleted] Edited by moderator 06.03.2006 18:54 Samsonov Alex [USU] Re: Why this program is not correct // Problem 1230. Introspective Program 5 Jan 2007 22:26 "sequence cannot contain the quote character it is enclosed in" svr Re: Why this program is not correct // Problem 1230. Introspective Program 3 Aug 2007 17:43 Thanks for idea! Create another myself I couldn't. But in this pattern except that told there is one additional small mistake. Veselin Georgiev Anyone want interpreter? // Problem 1230. Introspective Program 26 Feb 2005 21:27 The task is really cool. I wrote a tiny interpreter, that does not support "$" (who needs it anyway, since the problem could be solved without it). If anyone wants it, mail me (vessko_at_softhome_dot_net) Maigo Akisame (maigoakisame@yahoo.com.cn) How can this get WA? [2] // Problem 1230. Introspective Program 18 Aug 2004 09:41 program ural1230; begin writeln('A="?''A="+''"''+"''+A+''"+''"''+";''+A";?''A="''+A+''";''+A'); end. The PIBAS prog is as follows: A="?'A="+'"'+"'+A+'"+'"'+";'+A"; ?'A="'+A+'";'+A Vladimir Yakovlev (USU) Re: How can this get WA? [1] // Problem 1230. Introspective Program 18 Aug 2004 14:20 • Use write instead of writeln. CR/LF characters are not allowed in PIBAS program. • And your program is not introspective, your output is A="?'A="'+A+'";'+A";?'A="'+A+'";'+A Maigo Akisame (maigoakisame@yahoo.com.cn) Thx.AC now. // Problem 1230. Introspective Program 18 Aug 2004 19:35 UNKNOWN_LAMER Is to write an introspective program possible without $ function? [1] // Problem 1230. Introspective Program 5 Aug 2004 11:43 What do you think about it? UNKNOWN_LAMER Re: Is to write an introspective program possible without $ function? // Problem 1230. Introspective Program 5 Aug 2004 12:15 Oh, I have already ACed my program without $. :) But my PIBAS program(203 bytes) is longer, than it could be . TheBeet What wrong? [6] // Problem 1230. Introspective Program 10 May 2004 10:39 [some code in PIBAS, deleted by moderator] I think it is correct. But I got WA1. Edited by moderator 10.05.2004 14:57 Vladimir Yakovlev (USU) Do you submit code in PIBAS? [1] // Problem 1230. Introspective Program 10 May 2004 14:59 You must submit a program on C/C++ or Pascal which writes to output introspective program on PIBAS TheBeet Re: Do you submit code in PIBAS? // Problem 1230. Introspective Program 29 May 2004 08:41 No. I am not that foolish. I just print it out in mu program ТестоВор2 The same question! [3] // Problem 1230. Introspective Program 29 May 2004 01:52 [some code in PIBAS, deleted by moderator] Edited by moderator 24.06.2004 17:02 Vladimir Yakovlev (USU) Re: The same question! [2] // Problem 1230. Introspective Program 29 May 2004 10:39 There is a syntax error at position 40. Fix it and you get AC! tttttttttttttt Re: The same question! [1] // Problem 1230. Introspective Program 24 Jun 2004 14:50 ...+B+A+B+$... Can it be wrong? Vladimir Yakovlev (USU) Re: The same question! // Problem 1230. Introspective Program 24 Jun 2004 17:01 Sorry, error is at position 56: Instead of ?(A,1,3) must be ?$(A,1,3)
|