/**
*    author:  ekusiadadus
*    created: 24.02.2022 01:49:18
**/

#include<bits/stdc++.h>
using namespace std;
using i64 = long long;

i64 seed;

uint32_t x = 0, y = 1, z = 2, w = 3;
i64 generate() {
    uint32_t t = (x ^ (x << 11));
    x = y;
    y = z;
    z = w;
    w = (w ^ (w >> 19)) ^ (t ^ (t >> 8));
    return (i64)w;
}

int count(i64 c) {
    x = seed, y = 1, z = 2, w = 3;
    int res = 0;
    for(int i = 0; i < 10000001; ++i) if(generate() <= c) res++;
    return res;
}

int main() {
    cin >> seed;

    i64 ng = 0, ok = 1e18;
    while (ng + 1 != ok) {
        i64 md = (ng + ok) / 2;
        if (5000001 <= count(md)) ok = md;
        else ng = md;
    }
    cout << ok << endl;
    return 0;
}