#include <stdio.h>
#include <stdlib.h>
#include <math.h>
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typedef struct{
????double x;
????double y;
} zahyo;
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void koch(int, zahyo, zahyo);
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int main()
{
????int n;
????zahyo p1,p2;
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????p1.x = 0.0;
????p1.y = 0.0;
????p2.x = 100.0;
????p2.y = 0.0;
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????scanf("%d",&n);
????if( n<0 || 6<n ) exit(1);
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????printf("%f %f\n",p1.x, p1.y);?? /* ????????????§??¨? */
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????koch(n,p1,p2);
????printf("%f %f\n",p2.x, p2.y);???? /* ????????????§??¨? */
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????return 0;
}
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void koch(int n, zahyo p1, zahyo p2)
{
????zahyo s,t,u;
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????if( n==0 ) return;
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????s.x = ( 2*p1.x + p2.x )/3;
????s.y = ( 2*p1.y + p2.y )/3;
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????t.x = ( p1.x + 2*p2.x )/3;
????t.y = ( p1.y + 2*p2.y )/3;
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????u.x = ( t.x - s.x )*0.5 - ( t.y - s.y )*(sqrt(3)/2) + s.x; 
????u.y = ( t.x - s.x )*(sqrt(3)/2) + ( t.y - s.y )*0.5 + s.y;
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????koch(n-1, p1, s);
????printf("%f %f\n",s.x, s.y);
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????koch(n-1, s, u);
????printf("%f %f\n",u.x, u.y);
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????koch(n-1, u, t);
????printf("%f %f\n",t.x, t.y);
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????koch(n-1, t, p2);
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}