var a,b,c,h:integer;
begin
write('a=');readln(a);
write('b=');readln(b);
write('c=');readln(c);
h:=a;
if b>h then h:=b;
if c>h then h:=c;
if (a=c) and (a=b) then writeln(' Chieu cao 3 ban bang nhau va khong co nguoi cao nhat ')
else writeln(' Ban cao nhat la : ',h);
readln;
end.