#include <stdio.h>


double powXN(int n,double x)
{
    int i;
    double c;
    for(i=0;i<n;i++)
       c=x*x;

    return c;


{


double rootN(int n,double x)
{
    int i;
    double c;
    for(i=0;i<n;i++)
        c=x*1/n;

    return c;


{

double LogN(int n,double x)
{
    c=log10(x)/log10(n);
    return c;

}



int main()
{

    int n;
    double x;


  getchar();
  return 0;

}