using System;
using System.Collections.Generic;
using static System.Math;
namespace Demo.App {
/// A 2D point.
public class Point {
private double x;
private double y;
/// Distance from the origin.
public double Norm() {
return Sqrt(x * x + y * y);
}
}
public interface IRepo {
List<string> All();
}
public record Pair(int A, int B);
public enum Status { On, Off }
public struct Vector2 {
public double X;
}
}