lagrange

//#include<bits/stdc++.h>
#include<iostream>
#include<fstream>
#include<cmath>

#define long long long
#define nln '\n'

const long N = 1e8+10;

using namespace std;

// Global variables: f1, f2, n

fstream f1, f2;

inline void openf()
{
    f1.open("lagrange.inp", ios:: in);
    f2.open("lagrange.out", ios:: out);
}

inline void closef()
{
    f1.close();
    f2.close();
}

long n;

void data()
{
    f1.tie(0)->sync_with_stdio(0);
    f2.tie(0)->sync_with_stdio(0);
    cin.tie(0)->sync_with_stdio(0);
    cin >> n;
}

void process()
{
}

void view()
{
    if (1 <= n && n <= 3)
        cout << n << nln;
    else
        if (n >= 4 && n <= 6)
            cout << 3 << nln;
        else
            cout << 4 << nln;
}

int main()
{
    openf();
    data();
    process();
    view();
    closef();
    return 0;
}