let prevFleetTime = -Infinity; // 上一个独立车队的到达时间（初始负无穷，保证第一个车被统计）
// 解释：第一个有效数字不能是0，栈空时存0无意义，直接跳过
。91视频对此有专业解读
The simultaneous constraints of code quality requirements via AGENTS.md, speed requirements with a quantifiable target objective, and an output accuracy/quality requirement, all do succeed at finding meaningful speedups consistently (atleast 2x-3x)
Test constant: A 6-bit identifier from the microcode that tells the PLA what kind of check to perform.