4

using System;

namespace ConsoleApp27
{
    class Program
    {
        static void Main(string[] args)
        {
            int value = 1;
            int sum = 0;

            for (int i = 1; i <= 10; i++)
            {
                sum += value;
                Console.WriteLine($"{value} - {sum}");
                value += 2;
            }
        }
    }
}