#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;

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(void) {
  ll seed; cin >> seed; 

  int N = 10000001;

  ll lb = 0, ub = (ll)(UINT32_MAX) + 1;
  while(ub-lb>1){
    ll m = (lb+ub)/2;
    int n = 0;

    x = seed;
    y = 1;
    z = 2;
    w = 3;
    for (int i = 0; i < N; i++) {
      uint32_t g = generate();
      if(g <= m) n++;
    }

    if(n <= N/2) lb = m;
    else ub = m;
  }

  cout << ub << endl;

  return 0;
}