program baitap;
uses crt;
var a,b,c,max:real;
begin
clrscr;
writeln('nhap a,b,c:');
readln(a,b,c);
max:=0;
if (a>=b) and (a>=c) then max:=a;
if (b>=a) and (b>=c) then max:=a;
if (c>=a) and (c>=b) then max:=a;
writeln('so lon nhat la:',max:2:0);
readln
end.