#include <stdio.h>
#include <math.h>
??
   typedef struct{
????   double x;
????   double y;
   }point;
??
   void koch(int n, point p1, point p2){
????   if(n == 0) return;
??
????   point s, t, u;
????   s.x = (2*p1.x + 1*p2.x)/3;
????   s.y = (2*p1.y + 1*p2.y)/3;
????   t.x = (1*p1.x + 2*p2.x)/3;
????   t.y = (1*p1.y + 2*p2.y)/3;
????   u.x = (t.x - s.x)*0.5 - (t.y - s.y)*(sqrt(3.0)/2.0) + s.x;
????   u.y = (t.x - s.x)*(sqrt(3.0)/2.0) + (t.y - s.y)*0.5 + s.y;
??
??
??   ??koch(n-1, p1, s);
????   printf("%lf %lf\n", s.x, s.y);
????   koch(n-1, s, u);
????   printf("%lf %lf\n", u.x, u.y);
????   koch(n-1, u, t);
????   printf("%lf %lf\n", t.x, t.y);
????   koch(n-1, t, p2);
}
??
   int main(){
????   int n;
??   ??point p1 = {0, 0}, p2 = {100, 0};
????   scanf("%d", &n);
????   printf("%lf %lf\n", p1.x, p1.y);
????   koch(n, p1, p2);
????   printf("%lf %lf\n", p2.x, p2.y);
????   return 0;
}