Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

1 个练习尚无参考答案。铺开阶段仅作提示；cpp11 覆盖完整后收紧为错误。