// ⚠️ 易错点2：循环条件写left <= n-1（会导致left+1越界），或把<=写成<（漏判相等的有序情况）
block: Writes wait until buffer space is available. Use when you trust the producer to await writes properly.
，更多细节参见夫子
devices). So, the ATM behaved the same way.，更多细节参见同城约会
These robots can clean, exercise - and care for you in old age. Would you trust them to?