思路：找「右侧第一个 ≤ cur」的元素 → 弹出所有 cur 的元素，栈顶即为折扣。最终价格 = cur - 折扣（有则）或 cur（无则）。
第三十八条 非法携带枪支、弹药或者弩、匕首等国家规定的管制器具的，处五日以下拘留，可以并处一千元以下罚款；情节较轻的，处警告或者五百元以下罚款。
。关于这个话题，heLLoword翻译官方下载提供了深入分析
Before you set off, it's important to check out Best Buy's Pokémon page to find a Trade and Play event at a store near you. Once that's sorted, you're all set to capture the magic of Pokémon this weekend.
Discard old data — evict what's already buffered to make room