blyacheetotakie

var
  a,b,c,max,min,sum : integer;
  f1,f2 : text;

  begin
  assign(f1,'input.txt');
  assign(f2,'output.txt');

  reset(f1);
  read(f1,a,b,c);
  min:=0;
  max:=0;

  sum:=a+b+c;

  if (sum mod 2) = 0 then
    if (a<b) and (a<c) then
      begin
      min:=a;
      rewrite (f2);

      writeln(f2,min);
      close (f2);
      close(f1);
      end
    else
      if (b<a) and (b<c) then
      begin
      min:=b;
      rewrite (f2);

      writeln(f2,min);
      close (f2);
      close(f1);
      end
     else

      begin
       min:=c;
       rewrite (f2);

       writeln(f2,min);
       close (f2);
       close (f1);
       end
  else
    if (a>b) and (a>c) then
      begin
      max:=a;
      rewrite (f2);

      writeln(f2,max);
      close (f2);
      close (f1);
      end
     else
      if (b>a) and (b>c) then
      begin
      max:=b;
      rewrite (f2);

      writeln(f2,max);
      close (f2);
      close (f1);
      end
     else
     max:=c;
     rewrite (f2);

     writeln(f2,max);
     close (f2);
  end.