program hotboy;
uses crt;
var a,b,c : integer;
begin
clrscr;
write('nhap do dai canh thu nhat cua tam giac') ; readln(a);
write('nhap do dai canh thu hai cua tam giac') ; readln(b);
write('nhap do dai canh thu ba cua tam giac') ; readln(c);
if (a=b) or (c=b) or (a=c) then write('do la tam giac can')
else write('do khong phai tam giac can');
readln
end.