namespace ConsoleApp7

{

internal class Program
{
    static void Main(string[] args)
    {

        double Sn = 0;
        double n=0;
        n = GetSn(1);
        Console.WriteLine(n);
        
       int  GetSn(int x)
        {
            int i = 1;
          
            
                for (i = 1; i < 100000; i++)
                {
                    Sn = Sn +(double) 1.0 / i;
                if (Sn > x)
                
                    break;
                

                }
            return i;
            }
            
        

    }
}

}