描述：设计 StockSpanner 类。每次调用 next(price) 时，返回当日价格的「跨度」：从今天往回数，价格 ≤ 今日价格的最大连续天数（含今天）。
可“江湖”的惯性，远比一次功能更新更持久。某二手交易平台上，虚拟商品依旧活跃；新产品推出的“楼层级定位”“更强社交功能”，又在为这个数字小世界增添新的复杂度。这不禁令人思考：当功能性产品在技术的加持下不断强化“社交”属性，谁来为孩子们的“纯粹成长”留一方空间？
Since the 1960s, global GDP has been rapidly rising and living standards have reached record highs. But something else has been rocketing up too – carbon emissions. For years, scientists and economists have been asking: is it possible to grow without heating and polluting the Earth? And as the climate becomes more unstable, the issue is only becoming more urgent. Madeleine Finlay hears from two economists arguing for a change in how we measure a country’s success. Nick Stern is professor of economics and government at the London School of Economics and an advocate of green growth, an approach to growth that prioritises green industry. Jason Hickel is a political economist and professor at the Autonomous University of Barcelona who advocates degrowth, shrinking parts of the economy that do not advance our social and ecological goals.
Ранее президент США Дональд Трамп получил информацию о возможных военных действиях против Ирана на фоне переговоров между странами в Женеве.