using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    const int MaxCoefFicient = 50;

    public static void Main()

    {

        Console.Write("Введите сумму ставки:");

        var totalAmount = Convert.ToDouble(Console.ReadLine());

        Console.Write("Введите количество пар:");

        var pairCount = Convert.ToInt32(Console.ReadLine());

        var pairsList = new List<HorsePair>();

        for(var i = 1; i <= pairCount; i++)

        {

            Console.Write("Кличка лошади №" + i.ToString());

            var horseName = Console.ReadLine();

            Console.Write("Коэффициент для {0}:", horseName);

            var rate = Convert.ToInt32(Console.ReadLine());

            pairsList.Add(new HorsePair(horseName, rate, 0));

        }

        var lowestRate = pairsList.Min(x => x.Rate);

        for(var i = 0; i < pairCount; i++)

        {

            var item = pairsList[i];

            var currentCoef = ((double)lowestRate/(double)item.Rate)*MaxCoefFicient;

            item.Coefficient = currentCoef;

        }

        Console.WriteLine("Коэффициенты:");

        foreach(var item in pairsList)

        {

            Console.WriteLine("{0} : {1}", item.Horse, item.Coefficient);

        }

        var totalSum = pairsList.OrderByDescending(x => x.Rate).Skip(1).Sum(x => x.Coefficient);

        foreach (var item in pairsList.OrderByDescending(x => x.Rate).Skip(1))

        {

            item.Amount = totalAmount * (item.Coefficient / totalSum);

        }

        Console.WriteLine("Распределение по суммам:");

        foreach(var item in pairsList)

        {

            Console.WriteLine("{0} : {1}", item.Horse, item.Amount);

        }

    }

​

    class HorsePair 

    {

        public HorsePair(string horse, int rate,  double coefficient)

        {

            Rate = rate;

            Horse = horse;

            Coefficient = coefficient;

        }

        public int Rate { get; set; }

        public string Horse { get; set; }

        public double Coefficient { get; set; }

        public double Amount { get; set; }

    }

}