Cod sursa(job #1135868)

Utilizator azkabancont-vechi azkaban Data 8 martie 2014 15:07:09
Problema Sortare prin comparare Scor 100
Compilator fpc Status done
Runda Arhiva educationala Marime 1.52 kb
program heap;
const MAX_HEAP_SIZE = 500005;
var H : array [1..MAX_HEAP_SIZE] of longint;
    i,n : longint;

procedure swap(var x,y : longint);
  var aux : longint;
    begin
       aux:=x;
       x:=y;
       y:=aux;
    end;

procedure coboara( n, k : longint);
  var fiu : longint;
    begin
         repeat
               fiu:=0;
               if k*2<n then begin
                                  fiu:=k*2;
                                  if H[k*2+1]>H[k*2] then fiu:=k*2+1;
                                  if H[fiu]<=H[k] then fiu:=0
                              end
                        else
               if k*2=n then begin
                                  fiu:=k*2;
                                  if H[fiu]<=H[k] then fiu:=0;
                              end;
               if fiu<>0 then begin
                                    swap(H[k],H[fiu]);
                                    k:=fiu;
                              end;
         until fiu=0;
   end;


procedure heapsort(n : longint);
  var i :longint; begin
     for i:=n downto 2 do  begin
                                swap(H[1],H[i]);
                                coboara(i-1,1);
                           end;
  end;

begin
   assign(input,'algsort.in'); reset(input);
   assign(output,'algsort.out'); rewrite(output);
   readln(n);
   for i:=1 to n do read(H[i]);
   for i:=n div 2 downto 1 do coboara(n,i);
   heapsort(n);
   for i:=1 to n do write(H[i],' ');
   close(input);
   close(output);
end.