#include<stdlib.h>
#include<time.h>

#include<iostream>
using namespace std;


inline double pow_int(double x,int n) {
double res=1.0;
for(int i=0;i<n;++i)
   res*=x;
return res;
};




template<int N> inline double pow_int(double x) {
double res=1.0;
for(int i=0;i<N;++i)
   res*=x;
return res;
};


template<int N> inline double pow(double x) {return x*pow<N-1>(x);}
template<>      inline double pow<0>(double x) {return 1.0;}


main() {
  const double pi=3.1415926;
  const int n=5;
  const int N=100000000;
  const double X=(double)N;

  cout<<pow_int(pi,4)<<endl;  
  cout<<pow_int<4>(pi)<<endl;  
  cout<<pow<4>(pi)<<endl;  

  double z;
  clock_t start = clock();

  for(int i=0;i<N;i++) {
    z = pow_int(pi+i/X,n);
  }
    
  clock_t stop1 = clock();
  
  std::cout<<(stop1-start)/(double)CLOCKS_PER_SEC<<std::endl;

  start = clock();


  for(int i=0;i<N;i++) {
     z = pow_int<n>(pi+i/X);
  }
    
  stop1 = clock();
  
  std::cout<<(stop1-start)/(double)CLOCKS_PER_SEC<<std::endl;

  start = clock();

  for(int i=0;i<N;i++) {
     z = pow<n>(pi+i/X);
  }
    
  stop1 = clock();
  
  std::cout<<(stop1-start)/(double)CLOCKS_PER_SEC<<std::endl;




}