#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<string>
#include<set>
#include<cstring>
#include<memory.h>
#include<map>
#include<iterator>
#include<iomanip>
#include<algorithm>
#include<cmath>
#include<vector>

#define ll long long
#define graf(i) vector< vector<int> > (i)
#define in insert
#define ar erase
#define all(i) (i).begin(),(i).end()
#define mset(a) memset((a),0,sizeof((a)))
#define forp(i,n) for(int (i)=0;(i)<(n);(i)++)
#define form(i,n) for(int (i)=(n-1);(i)>=0;(i)--)
#define F first
#define S second
using namespace std;

void filein()
   {
    freopen("input.txt","r",stdin);
    }
void fileout()
   {
    freopen("output.txt","w",stdout);
    }
    int x;
    int rec (int x)
    {
	    if(x==1) return 0;
	    if(x==2) return 1;
	    return rec(x/3+(x%3 ? 1 : 0 ))+1;
	    }
int main()
{
	cin>>x;
	cout<<rec(x)<<endl;
	return 0;


}