failed to resolve: use of undeclared crate or module `std`

unresolved imports `crate::HashMap`, `crate::HashSet`, `crate::HashSet`, `crate::HashMap`

Process completed with exit code 101.

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: hecrj/setup-rust-action@v1. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.