#include<stdio.h>
#include<math.h>
FILE *f1,*f2;
int main()
{unsigned n,i,j,k=0,x,y,o,p;
f1=fopen("frz.in","r");
f2=fopen("frz.out","w");
fscanf(f1,"%u",&n);
for(i=1;i<=n;i++)
{ x=i;
 for(j=1;j<=n;j++)

		{ y=j;
	 while(x!=y)
			{if(x>y)
				x=x-y;
			 else
				y=y-x;}
			 if(x==1)
					k++;
					x=i;}}

fprintf(f2,"%u",k);









fclose(f1);
fclose(f2);
return 0;}