#include<stdio.h>
void readd(),solve(),afisare();
int n,i,j,sol=0;
int main()
{
	readd();
	solve();
	afisare();
	return 0;
}
void readd()
{
	freopen("fractii.in","r",stdin);
	freopen("fractii.out","w",stdout);
	scanf("%d",&n);
}
void solve()
{
	for(i=1;i<=n;i++)
		for(j=2;j<=n;j++)
		{
			while(i!=j)
			{
				if(i>j)i=i-j;
				if(i<j)j=j-i;
				if(i==1)sol++;
			}
		}
}
void afisare()
{
	printf("%d",sol);
}