27-2

var n,i,a,b,c,minra,minrc,a1,b1,c1,minrb,x,y,z:integer;
begin
  readln(n);
  readln(a,b,c);
  readln(x,y,z);
  a1:=max(a+x,max(b+x,c+x));
  b1:=max(a+y,max(b+y,c+y));
  c1:=max(a+z,max(b+z,c+z));
  a:=a1; b:=b1; c:=c1;
  if abs(x-y) mod 2<>0 then
    minra:=abs(x-y)
  else minra:=abs(x-y)+1;
  if abs(z-y) mod 2<>80 then
    minrc:=abs(z-y)
  else minrc:=abs(z-y)+1;
  for i:=3 to n do
    begin
      readln(x,y,z);
      if (abs(x-y)<minra) and (abs(x-y) mod 2 <> 0) then minra:=abs(x-y);
      if (abs(z-y)<minrc) and (abs(x-y) mod 2 <> 0) then minrc:=abs(z-y);
      a1:=max(a+x,b+x);
      b1:=max(a+y,max(b+y,c+y));
      c1:=max(b+z,c+z);
      a:=a1;
      b:=b1;
      c:=c1;
    end;
    minrb:=min(minra,minrc);
if a mod 2<>0 then a:=a-minra;
if b mod 2<>0 then b:=b-minrb;
if c mod 2<>0 then c:=c-minrc;
writeln(max(a,max(b,c)));
end.