#define _USE_MATH_DEFINES
#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define MT make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define RT return
#define vv(a,b,c,d) vector<vector<a> >(b,vector<a>(c,d))
#define vvv(a,b,c,d,e) vector<vector<vector<a> > >(b,vv(a,c,d,e))
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;

// https://yukicoder.me/problems/no/702
uint32_t x = 0, y = 1, z = 2, w = 3;
uint32_t generate() {
    uint32_t t = (x ^ (x << 11));
    x = y;
    y = z;
    z = w;
    w = (w ^ (w >> 19)) ^ (t ^ (t >> 8));
    return w;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(20);

    uint32_t seed; cin >> seed;
    
    ll ng = -1, ok = UINT32_MAX;
    while (ok - ng > 1) {
        x = seed, y = 1, z = 2, w = 3;
        ll val = (ok + ng) / 2;
        int cnt = 0;
        for (int i = 0; i < 10000001; i++) {
            ll a = generate();
            if (a <= val)cnt++;
        }
        (cnt >= 5000001 ? ok : ng) = val;
    }
    cout << ok << endl;
}