using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography.X509Certificates;

namespace ConsoleApp4
{
    internal class Program
    {
        static void Main(string[] args)
        {
            List<List<int>> list = new List<List<int>>();
            List<double> dist = new List<double>();
            Console.WriteLine("how many points?");
            int n = Convert.ToInt32(Console.ReadLine());
            for (int i = 1; i <= n; i++)
            {
                Console.Write($"x{i}: ");
                int x = Convert.ToInt32(Console.ReadLine());
                Console.Write($"y{i}: ");
                int y = Convert.ToInt32(Console.ReadLine());
                List<int> crds = new List<int>() {x, y};
                list.Add(crds);
            }
            foreach (List<int> i in list)
            {
                int x= i[0], y = i[1];
                double s = Math.Pow(Math.Pow(x, 2) + Math.Pow(y, 2), 0.5);
                dist.Add(s);
            }

            Console.WriteLine($"n{dist.IndexOf(dist.Min()) + 1}, len == {dist.Min()}");
        }
    }

}