完美日记起家于“大牌平替”，从诞生之初就锚定高性价比、入门级、年轻学生党的用户标签。这种定位帮助它快速起量，但也给品牌套上了沉重的枷锁：在用户心智中，完美日记等同于“便宜、基础、平替”，这种认知一旦形成，极难改写。
Lowest danger rate
，详情可参考91视频
思路：倒序遍历 + 单调索引栈（仅存索引），计算下一个高温的间隔天数。栈顶索引 - 当前索引即为等待天数。
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: