#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } //constexpr long long MAX = 5100000; constexpr long long INF = 1LL << 60; constexpr int inf = 1000000007; constexpr long long mod = 1000000007LL; //constexpr long long mod = 998244353LL; const long double PI = acos((long double)(-1)); using namespace std; typedef unsigned long long ull; typedef long long ll; typedef long double ld; 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() { /* cin.tie(nullptr); ios::sync_with_stdio(false); */ ll seed; cin >> seed; ll lf = 0; ll rg = INF; int n = 10000001; int hf = (n + 1) / 2; while (rg - lf > 1) { ll mid = (lf + rg) >> 1; int cnt = 0; x = seed; for (int i = 0; i < n; i++) if (generate() >= mid) cnt++; if (cnt >= hf) lf = mid; else rg = mid; } cout << lf << endl; return 0; }