Предварительно работала российская противовоздушная оборона (ПВО).
习题链接：LeetCode 402. 移掉 K 位数字，详情可参考夫子
Block is the latest business to announce layoffs, with the operator of payment platforms Square and Cash App opting to cut jobs in favor of using more AI tools. The financial tech company, helmed by Twitter founder Jack Dorsey, is slashing its current staff of 10,000 to "just under 6,000." CNBC highlighted a letter Block sent to shareholders announcing the decision to nearly halve its workforce. According to the message from Dorsey:，推荐阅读safew官方版本下载获取更多信息
"It felt like one of those special sites that you do get every so often," he said.