Автор - piv004
Ответ:
program temp;
var
d, x, y: Double;
begin
Write ('d, x, y: ');
ReadLn (d, x, y);
if (x >= 0) and (y >= 0) and (x + y <= d) then
WriteLn (1)
else
WriteLn (0);
ReadLn;
end.