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  1. program ricerca; 
  2. const MAXN=100002;
  3. Type  elenco = array[0.. MAXN-1] of int64;           
  4.  
  5. var N,i, id:Longint;
  6.     T : int64;
  7.     P :elenco; 
  8.  
  9. Procedure scambia (var a,b: int64);
  10. var x:int64;
  11. begin
  12.    x:=a;
  13.    a:=b;
  14.    b:=x;
  15. end;  
  16.  
  17. Procedure ordinamento (estremoi,estremos: int64; var v : elenco;  ordinato:boolean);
  18. var inf, sup, medio:int64;
  19.     pivot :int64;
  20. begin
  21.     inf:=estremoi;
  22.     sup:=estremos;
  23.     medio:= (estremoi+estremos) div 2;
  24.     pivot:=v[medio];
  25.     repeat
  26.       if (ordinato) then
  27.          begin
  28.             while (v[inf]<pivot) do  inf:=inf+1;
  29.             while (v[sup]>pivot) do  sup:=sup-1;
  30.          end;
  31.       if inf<=sup then
  32.        begin
  33.          scambia(v[inf],v[sup]);
  34.          inf:=inf+1;
  35.          sup:=sup-1;
  36.        end;
  37.     until inf>sup;
  38.     if (estremoi<sup) then ordinamento(estremoi,sup,v,ordinato);
  39.     if (inf<estremos) then ordinamento(inf,estremos,v,ordinato);
  40. end;
  41. Procedure ricercaUpper (var w:elenco; target:int64); (*ritorna indice del valore maggiore/uguale a target oppure -1 se non esiste*)
  42.   var m,start,eend: int64;
  43.  
  44.  begin  
  45.    start:=0; eend:=N-1 ; m:=-1;
  46.    while start<=eend do
  47.            begin
  48.                   m:=(start + eend) div 2;
  49.                   if w[m]<target then  start:=m+1
  50.                                  else  if w[m]>=target then  begin id:=m;  eend:=m-1 end;
  51.            end;
  52.    if start=N then id:=-1;
  53.  end;
  54.  
  55. begin
  56.    readln(N);
  57.    readln (T); (*valore da confrontare*)
  58.    for i:=0 to N-1 do read(P[i]); readln;
  59.    ordinamento(0,N-1,P,true);
  60.    for i:=0 to N-1 do write(P[i],' '); writeln;
  61.    ricercaUpper(P, T);
  62.    if id<>-1 then  writeln(id)
  63.              else  writeln('target non trovato  ') ;
  64. end.
Success #stdin #stdout 0s 5280KB
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https://ideone.com/Npdxfs
language:
Pascal (fpc 3.0.4)
created:
6 hours ago
visibility:
public

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