#pragma GCC optimize("O3")
#include <algorithm>

#include <bits/stdc++.h>
#define ll long long
#define rep(i,n) for(ll i=0;i<(n);i++)
#define pll pair<ll,ll>
#define pii pair<int,int>
#define pq priority_queue
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define endl '\n'
#define ios ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define lb(c,x) distance(c.begin(),lower_bound(all(c),x))
#define ub(c,x) distance(c.begin(),upper_bound(all(c),x))

using namespace std;



template<class T> inline bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T> inline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}

const int INF=1e9;

const double pi=acos(-1);

int main(){
    int x;
    cin >> x;
    vector<long double> p(32);
    p[2]=644934.0668;
    p[3]=202056.9032;
    p[4]=82323.23371;
    p[5]=36927.75514;
    p[6]=17343.06198;
    p[7]=8349.277382;
    p[8]=4077.356198;
    p[9]=2008.392826;
    p[10]=994.5751278;
    p[11]=494.1886041;
    p[12]=246.0865533;
    p[13]=122.7133476;
    p[14]=61.24813506;
    p[15]=30.58823631;
    p[16]=15.28225941;
    p[17]=7.637197638;
    p[18]=3.817293265;
    p[19]=1.908212717;
    p[20]=0.9539620339;
    p[21]=0.4769329868;
    p[22]=0.2384505027;
    p[23]=0.119219926;
    p[24]=0.05960818905;
    p[25]=0.02980350352;
    p[26]=0.01490155483;
    p[27]=0.00745071179;
    p[28]=0.003725334025;
    p[29]=0.001862659724;
    p[30]=0.0009313274324;
    p[31]=0.0004656629065;
    if(x==10){
        //cout << 1980 << endl;
        //return 0;
    }
    if(x>31){
        cout << 0 << endl;
    }
    else{
        long double ans=0.0;
        for(int i=x;i<=31;i++){
            ans+=p[i];
            
        }
        int val=ans;
        //cout << setprecision(30) << fixed;
        //cout << ans << endl;
        cout << val << endl;
    }
    
    return 0;
}