#include <bits/stdc++.h>

using namespace std;

class generator {
  uint32_t x;
  uint32_t y = 1;
  uint32_t z = 2;
  uint32_t w = 3;
public:
  generator(uint32_t x): x(x) {}

  uint32_t get() {
    uint32_t t = (x^(x<<11));
    x = y;
    y = z;
    z = w;
    w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)); 
    return w;
  }
};


int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  uint32_t seed;
  cin >> seed;
  
  long long hi = 1LL<<32;
  long long lo = -1;

  while (hi - lo > 1) {
    long long mi = (lo + hi) / 2;
    generator g(seed);

    int sum = 0;
    for (int i = 0; i < 1e7 + 1; i++) {
      if (mi >= g.get())
        ++sum;
    }

    if (sum > 5000000)
      hi = mi;
    else
      lo = mi;
  }

  cout << hi << endl;
  
  return 0;
}