extern int Measure(int RM, int CM);
extern void Pinpoint(int RP, int CP);

#include <cstdio>
#include <vector>
#include <cassert>
#include <iostream>
#include <cstdint>
#include <chrono>
#include <algorithm>
#include <map>
using namespace std;
#define I64 int64_t
#define curtime chrono::system_clock::time_point
#define getcurtime chrono::system_clock::now

uint32_t x = 0, y = 1, z = 2, w = 3;
int64_t g_seed;
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 check(uint32_t a, bool& same){
  same = false;
  uint32_t q;
  int ret = 0;
  x = g_seed;
  y = 1;
  z = 2;
  w = 3;
  for (int i = 0; i < 10000001; i++){
    q = generate();
    if(q < a){
      ret++;
    } else if(q == a){ same = true; }
  }
  return ret;
}


int main(void)
{
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  bool same = false;
  std::cin >> g_seed;
  uint32_t min, max;
  min = 0; max = 4294967295;
  while(min + 1 < max){
    uint32_t mid = (uint32_t)((((uint64_t)min + (uint64_t)max) / (uint64_t)2));
    int lownum = check(mid, same);
    if(lownum <= 5000000){
      min = mid;
    } else {
      max = mid;
    }
  }
  cout << min << endl;
}