// 2. 计算前缀和：count[i]表示<=i的元素个数
For the user, this is completely transparent.
，推荐阅读搜狗输入法2026获取更多信息
Fast forward a year: they get a new phone and set up the messaging app. They aren’t prompted to use a passkey because one no longer exists in their credential manager. Instead, they use phone number verification to recover their account. They are then guided through the “restore backup” flow and prompted for their passkey.
精细化管控：支持分批、分级、按需迁移