Цены на нефть взлетели до максимума за полгода17:55
The number of people sleeping rough in England is at its highest level since records began in 2010.，推荐阅读旺商聊官方下载获取更多信息
US stock markets have been hit by a further wave of AI jitters, this time from yet another viral – and completely speculative – warning about the impact of the technology on the world’s largest economy.。关于这个话题，51吃瓜提供了深入分析
输入：num = "1432219", k = 3