#include <cstdio>
using namespace std;
int main()
{
long n;
while(scanf("%ld",&n)==1&&n!=0)
if(n==1)
printf("0\n");
continue;
}
int t=1;
--n;
while(n>=3)
n=n/3;
t++;
printf("%d\n",t);
return 0;