#include <bits/stdc++.h>
using namespace std;

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) {
    long long seed; cin >> seed;
    x = seed;
    long long left = 0; long long right = UINT32_MAX;
    for (int cas = 0; cas < 200; cas++) {
      long long mid = (left + right) / 2;
      int cnt = 0;
      for (int i = 0; i < 10000001; i++) {
        uint32_t  t = generate();
        if (t <= mid) cnt--;
        if (t >= mid) cnt++;
      }
      if (cnt == 0) {
        cout << mid << endl;
        return 0;
      }
      if (cnt > 0) left = mid+1;
      if (cnt < 0) right = mid;
      x = seed, y = 1, z = 2, w = 3;
    }
    cout << "NG" << endl;
    return 0;
}