// 优化点：仅i<len时赋值（避免重复赋值，提升效率）
The technical sophistication of AI models continues advancing rapidly, with implications for optimization strategies. Future models will better understand nuance, maintain longer context, cross-reference information more effectively, and potentially access real-time data more seamlessly. These improvements might make some current optimization tactics less important while creating new opportunities for differentiation.
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candidate[n] = closest colour to goal
测试场景：给出一个 200 行的混乱 Python 爬虫脚本，要求重构为面向对象结构，并输出 Mermaid 类图。