pascal

program fibo;
var a,b,c,i:integer;
begin
     a:=1;
     b:=1;
     write(a:8,b:8);
     for i:=1 to 8 do
     begin
       c:=a+b;
       a:=b;
       b:=c;
       write(c:8)
     end;
     readln
end.

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program prim;
var i,j,p,n:integer;
begin
   writeln('Meddig irassuk ki a primeket?');
   readln(n);
   for i:=2 to n do
   begin
    p:=0;
    for j:=2 to round(sqrt(i)) do
     if i mod j=0 then p:=1;
    if p=0 then write(i:8);
   end;
   readln
end.

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program lnko_s;
var a,b,i,lnko,lkkt,c:integer;
begin
     WriteLn('Kerem a ket szamot!');
     ReadLn(a);
     ReadLn(b);
     if a<b then
            begin
            c:=a;
            a:=b;
            b:=c
            end;
     For i:=2 to a do
      if(a mod i=0) and (b mod i=0) then lnko:=i;
     lkkt:=round(a*b/lnko);
     WriteLn('Az lnko: ', lnko, ' Az lkkt: ', lkkt);
     ReadLn
End.

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 program erasztoteneszi_szita;
const limit=10000;
var t:array [1..limit] of boolean;
    i,j:word;
begin
    for i:=1 to limit do t[i]:=true;
    i:=2;

    while i<=round(sqrt(limit)) do
    begin
     j:=2*i;
     while j<=limit do
      begin
      t[j]:=false;
      inc(j,i);
      end;
     inc(i);
     while not t[i] do
      inc(i);
    end;
    for i:=2 to limit do if t[i] then write(i:5);
    readln
end.

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