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  1. program casino;
  2. Uses sysutils;
  3. {$H+}
  4. const lung=1000000;
  5. var  N,M,C,w,v,coppie,index:Int64;
  6.      temp: AnsiString;
  7.      stringa:array[0..lung] of char;
  8.      S,S_ruotate:array[0..lung] of AnsiString;
  9.      funz_errore : array[0..2000000] of Int64;
  10.  
  11. function LexicalMinRotation(var x: AnsiString):Int64;
  12. var 
  13. len,K,i,j:Int64;
  14.  
  15. begin
  16.    len:=length(x); 
  17.    for i:=0 to len do funz_errore[i]:=-1;
  18.    K:=1; 
  19.    for j:=2 to len do
  20.            begin
  21.              i:=funz_errore[j - k-1 ];
  22.              while (i <> -1 ) and (x[j] <> x[(k + i )]) do
  23.                             begin
  24.                               if x[j] < x[(k + i )] then k:= j - i - 1;
  25.                               i:= funz_errore[i];
  26.                             end;                           
  27.             if (i = -1) and (x[j] <> x[(k + i+1 )]) then
  28.                                                        begin
  29.                                                           if x[j] < x[(k + i+1 )] then k:= j;
  30.                                                           funz_errore[j - k+1]:= -1;
  31.                                                        end           
  32.                                                     else   funz_errore[j - k]:= i + 1;
  33.  
  34.          end;   
  35.  LexicalMinRotation:=k;
  36.  
  37. end;
  38.  
  39. begin
  40.    (*assign(input, 'input.txt'); reset(input);
  41.    assign(output, 'output.txt'); rewrite(output);*)
  42.    readln (N,M);
  43.    for w:=0 to N-1 do begin readln(S[w]);  S[w]:=Trim(S[w]); end;
  44.    coppie:=0; 
  45.    for w:=0 to N-1 do
  46.           begin
  47.  
  48.             index:=LexicalMinRotation(S[w]);
  49.             temp:=S[w]+S[w];
  50.             S_ruotate[w]:=copy(temp,index,M);
  51.           end;
  52.     for w:=0 to N-2 do  
  53.              for v:=w+1 to N-1 do
  54.                         begin
  55.                           C:= CompareStr(S_ruotate[w], S_ruotate[v]);
  56.                           if C=0 then coppie:=coppie+1;
  57.                         end; 
  58.     writeln (coppie);
  59. end.
Success #stdin #stdout 0.02s 5276KB
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https://ideone.com/a8yTKp
language:
Pascal (fpc 3.0.4)
created:
7 days ago
visibility:
public

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