///|
/// Run the built-in school fire drill and print a Markdown report.
fn main {
  let plan = @sbs.school_fire_scenario()
  let diagnostics = @sbs.validate_plan(plan)
  if !@sbs.validation_ok(diagnostics) {
    println(@sbs.validation_markdown(plan, diagnostics))
    return
  }
  let result = @sbs.run_simulation(plan, @sbs.SimulationConfig::default())
  println(@sbs.simulation_markdown(result))
}