/* -*- coding: utf-8 -*-
 *
 * 702.cc: No.702 中央値を求めよ LIMITED - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int N = 10000001;
const int MED = (N + 1) / 2;

/* typedef */

typedef uint32_t ui;
typedef long long ll;

/* global variables */

ui x = 0, y = 1, z = 2, w = 3;

/* subroutines */

inline ui generate(ui &x, ui &y, ui &z, ui &w) {
  ui t = (x ^ (x << 11));
  x = y;
  y = z;
  z = w;
  w = (w ^ (w >> 19)) ^ (t ^ (t >> 8));
  return w;
}

/* main */

int main() {
  ui seed;
  scanf("%u", &seed);

  ll l = -1, r = (1LL << 32) - 1;
  while (l + 1 < r) {
    ll m = (l + r) / 2;

    int cnt = 0;
    ui x = seed, y = 1, z = 2, w = 3;
    for (int i = 0; i < N; i++) {
      ui ai = generate(x, y, z, w);
      if (ai <= m) cnt++;
    }

    if (cnt >= MED) r = m;
    else l = m;
  }

  printf("%lld\n", r);
  return 0;
}