Var x1, x2, y1, y2: integer; O: boolean; begin write('X1: '); readln(x1); write('Y1: '); readln(y1); write('X2: '); readln(x2); write('Y2: '); readln(y2); if (x1 < 0) and (x2 < 0) and (y1 < 0) and (y2 < 0) then O:=true; if (x1 < 0) and (x2 < 0) and (y1 > 0) and (y2 > 0) then O:=true; if (x1 > 0) and (x2 > 0) and (y1 > 0) and (y2 > 0) then O:=true; if (x1 > 0) and (x2 > 0) and (y1 < 0) and (y2 < 0) then O:=true; if O = true then write('TRUE') else write('FALSE'); end.
O: boolean;
begin
write('X1: ');
readln(x1);
write('Y1: ');
readln(y1);
write('X2: ');
readln(x2);
write('Y2: ');
readln(y2);
if (x1 < 0) and (x2 < 0) and (y1 < 0) and (y2 < 0) then O:=true;
if (x1 < 0) and (x2 < 0) and (y1 > 0) and (y2 > 0) then O:=true;
if (x1 > 0) and (x2 > 0) and (y1 > 0) and (y2 > 0) then O:=true;
if (x1 > 0) and (x2 > 0) and (y1 < 0) and (y2 < 0) then O:=true;
if O = true then write('TRUE')
else write('FALSE');
end.