#include "bits/stdc++.h"

using namespace std;

#define pb push_back
#define mp make_pair
constexpr int INF = 1 << 29;
constexpr int MOD = 1000000007;
typedef long long ll;
typedef unsigned long long ull;

constexpr int dx[4] = {1, 0, -1, 0};
constexpr int dy[4] = {0, 1, 0, -1};

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) {
    ll seed; cin >> seed; 
    x = seed;

    int n = 10000001;
    priority_queue<uint32_t> Q;

    for (int i = 0; i < n; i++) {
        uint32_t a = generate();
        Q.push(a);
        if (Q.size() > (n - 1) / 2 + 1) {
            Q.pop();
        }
    }
    cout << Q.top() << endl;
    return 0;
}