#include <fstream.h>
int main ()
{long long i,n,j,y,x,nr=0;
ifstream q ("fractii.in");
ofstream w ("fractii.out");
while(x!=y)
			if(x>y)
				x=x-y;
			else
				y=y-x;
		if(x==1)
			nr++;
		}
nr=nr+n;
w<<nr<<'\n';
return 0;
}