```rust
use tsp_solver::{Point2D, TspSolver};

pub fn main() {
    let problem = Point2D::random(20, 16.0, 9.0);
    let mut solver = TspSolver::load_or_create("target/days365/", problem.view());
    for solution in solver.ant_colony_optimization(20) {
        println!("{:04}: {}", solution.best_distance, solution.best_path);
    }
}
```