using System;
namespace P3-7
{
    class Program
    {
      static void Main(string[] args)
        {
          int count,sum;
            sum = 0;
            for (count = 1; count <= 100;count++ ) 
 sum += count;
            Console.WriteLine("1100ۼӺǣ{0}",sum);
            Console.ReadLine();
     }
    }
}
