program lol;

function Max(a,b,c:integer):integer;
var mx:integer;
begin
if a>b then mx:=a else mx:=b;
if c>mx then mx:=c;
Max:=mx
end;

var
    a, b, c, maxel: integer;

begin
    read(a, b, c);

    maxel := Max(a, b, c);
    if 2 * maxel < a + b + c then
    writeln(True)
    else
    writeln(False);

end.