#include <iostream>
#include <cstdio>
#include <vector>
#include <cmath>
#include <algorithm>
#include <string>
#include <queue>
#include <utility>
#include <set>
#include <iomanip>
#include <ctime>

using namespace std;

#define ll long long
#define pi 3.141592653589793
#define pb push_back
#define forto(l,a,b) for(long long l = a; l <= b; ++l)
#define downto(l,a,b) for(long long l = a; l >= b; --l)
#define Fred_Flinstone ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define ln '\n'
#define decimal cout<<fixed<<setprecision(15)

int x[1234];
int cnt;

bool cmp(long a, long b){
    string s;
    //cout << "1 " << a << ' ' << b << ln;
    //cout << flush;
    //cin >> s;
    cnt++;
    s = x[a] < x[b] ? "Y" : "N";
    if (s[0] == 'Y') return 1;
    return 0;
}

int main()
{
    Fred_Flinstone;
    long n;
    vector< long > v;
    
    cin >> n;
    
    forto(f, 1, n){
        x[f]=rand()%100000;
        v.pb(f);
    }
    
    sort(v.begin(), v.end(), cmp);
    cout << cnt << "\n";
    return 0;
    cout << "0 ";
    forto(f, 0, n-1){
        cout << v[f] << ' ';
    }
    return 0;
}