// includes
#include <cstdio>
#include <cstdint>
#include <iostream>
#include <iomanip>
#include <string>
#include <queue>
#include <stack>
#include <vector>
#include <set>
#include <map>
#include <unordered_map>
#include <algorithm>
#include <utility>
#include <functional>
#include <cmath>
#include <climits>
#include <bitset>
#include <list>
#include <random>

// macros
#define ll long long int
#define pb emplace_back
#define mk make_pair
#define pq priority_queue
#define FOR(i, a, b) for(int i=(a);i<(b);++i)
#define rep(i, n) FOR(i, 0, n)
#define rrep(i, n) for(int i=((int)(n)-1);i>=0;i--)
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define UNIQUE(v) v.erase(unique(v.begin(), v.end()), v.end())

using namespace std;

//  types
typedef pair<int, int> P;
typedef pair<ll, int> Pl;
typedef pair<ll, ll> Pll;
typedef pair<double, double> Pd;
 
// constants
const int inf = 1e9;
const ll linf = 1LL << 50;
const double EPS = 1e-10;
const int mod = 1e9 + 7;

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

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(int argc, char const* argv[])
{
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int seed;
  cin >> seed;
  uint32_t l = 2145000000, r = 2148000000;
  int itr = 10000001;
  uint32_t prev = -1;
  while(r - l > 1){
    x = seed, y = 1, z = 2, w = 3;
    uint32_t m = (l + r) / 2;
    if(prev == m){
      l = m;
      break;
    }
    int b = 0;
    for(int i = 0; i < itr; i++){
      uint32_t tmp = generate();
      if(tmp > m)b++;
    }
    if(b >= itr - b)l = m + 1;
    else r = m + 1;
    prev = m;
  }
  cout << l << endl;
	return 0;
}