When you overload a credential used for authentication by also using it for encryption, the “blast radius” for losing that credential becomes immeasurably larger.
swap(&arr[low], &arr[randomIdx]); // 基准换到开头
，这一点在同城约会中也有详细论述
What is Blockchain Decentralization?Blockchain technology is safe, even if it’s public. People can access the technology using an internet connection.
当古老的套色工艺遇上现代商业IP，这种“反差萌”瞬间击穿了年轻人的审美壁垒。
const posToTime = new Map(); // 映射：位置 → 到达终点的时间