program goc;

var
  n : byte;

procedure swap(var a: integer; var b: integer);
  var
    tmp : integer;
  begin
    tmp:=a; a:=b; b:=tmp;
  end;

procedure tamgiac;
  var
    a, b, c : integer;
  begin
    read(a, b, c);
    { Đặt C lớn nhất, B lớn nhì, A bé nhất }
    if (a > b) then swap(a, b);
    if (a > c) then swap(a, c);
    if (b > c) then swap(b, c);
    if a + b + c = 180 then write('LA 3 GOC CUA TAM GIAC')
    else
      begin
        writeln('KHONG LA 3 GOC CUA TAM GIAC'); 
        exit
      end;
    if c = 90 then writeln(' VUONG')
    else if c > 90 then writeln(' TU')
    else if c < 90 then writeln(' NHON')
    else writeln(' THUONG');
    writeln(a,' ',b,' ',c);
  end;

procedure tugiac;
  var
    a, b, c, d : integer;
  begin
    read(a, b, c, d);
    { Đặt C lớn nhất, B lớn nhì, A bé nhất }
    if a + b + c + d = 360 then write('LA 4 GOC CUA')
    else
      begin
        writeln('KHONG LA 4 GOC CUA TU GIAC'); 
        exit
      end;
    if (a = 90) and (b = 90) and (c = 90) then writeln(' HINH CHU NHAT')
    else writeln(' TU GIAC')
  end;

begin
  read(n);
  if n = 3 then tamgiac;
  if n = 4 then tugiac;
end.

uses crt;

var n:integer;

procedure tamg;

var a,b,c:integer;

begin

readln(a,b,c);

if a+b+c=180 then begin writeln('3 goc nay la so do cua tam giac.');

if (a=90) or (b=90) or (c=90) then writeln('Tam giac nay tam giac vuong')

else if (a=b) or (a=c) or (b=c) then writeln('Tam giac nay la tam giac can')

else if (a=b) and (b=c) then writeln('Tam giac nay la tham giac deu')

else writeln('Tam giac nay la tam giac thuong'); end

else writeln('3 goc nay khong phai la so do cua tam giac.'); end;

procedure tug; var a,b,c,d:integer;

begin

readln(a,b,c,d);

if a+b+c+d=360 then

begin

writeln('4 goc nay la so do cua tu giac.');

if (a=b) and (b=c) and (c=d) then writeln('Tu giac nay la hinh chu nhat')

else writeln('Tu giac nay la tu giac thuong');

end else write('4 goc nay khong phai la so do cua tu giac.'); end;

begin

clrscr;

readln(n);

if n=3 then tamg;

if n=4 then tug;

readln

end.