program test(output);
var i,j,k:integer;
begin
  i:=0;
  if i=1 then j:=2;
  if (i=j) and (j=2) then k:=0;
  if (i=k) or (j=k) then j:=0;
  if (i=k) and (1=1) then k:=0;
  if (i=k) and (1<>1) then k:=0;
  if (1=1) and (i=k) then k:=0;
  if (1<>1) and (i=k) then k:=0;
  if (i=k) or (1=1) then k:=0;
  if (i=k) or (1<>1) then k:=0;
  if (1=1) or (i=k) then k:=0;
  if (1<>1) or (i=k) then k:=0;
  if ((i=k) or (1=1)) and not((0<>1) or (j=k)) then k:=0;
end.