摘要：
Time limit: 3.000 secondsBackgroundA problem that is simple to solve in one dimension is often much more difficult to solve in more than one dimension. Consider satisfying a boolean expression in conj... 阅读全文
摘要：
Time limit: 3.000 secondsBackground(An homage to Theodore Seuss Geisel)The Cat in the Hat is a nasty creature,But the striped hat he is wearing has a rather nifty feature.With one flick of his wrist h... 阅读全文