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）。
ВСУ запустили «Фламинго» вглубь России. В Москве заявили, что это британские ракеты с украинскими шильдиками16:45
。爱思助手下载最新版本对此有专业解读
He appeared in handcuffs and wearing an olive-green sweat suit during his arraignment Thursday evening in Manhattan criminal court. He wasn’t asked to enter a plea, and was released, pending his next court date on April 9.
England face off against New Zealand in their final game before the semi finals. England have already secured their spot in the semi finals, but New Zealand need a result. The pressure is all on the Black Caps.