class Program
{
static void Main(string[]args)
float b-1=1;
float q=0,5f;
float s=0;
for[int=1; ikyzhy=50;i++]
float b-i=b-1 "(float)Matcg.Pow[q,[i-1];
s=s+b-i;
Console.Writeline[''s-[''+i+'']=''+s];
}
Console.Writeline[''s-n=''+s];
Console.Readline[];