#![allow(non_snake_case, unused_imports)]

use itertools::Itertools;
use proconio::{input, marker::Chars, marker::Usize1};
use std::cmp::{Reverse, max, min};
use std::collections::{BinaryHeap, HashMap, HashSet, VecDeque};

#[allow(unused_macros)]
macro_rules! d {
    ( $( $x:expr ),* $(,)? ) => {
        eprintln!(
            concat!( $( stringify!($x), "={:?} " ),* ),
            $( $x ),*
        );
    };
}

#[allow(dead_code)]
fn yn(b: bool) -> &'static str {
    if b { "Yes" } else { "No" }
}

fn generate(seed: u32) -> impl FnMut() -> u32 {
    let mut x = seed;
    let mut y = 1;
    let mut z = 2;
    let mut w = 3;

    move || {
        let t = x ^ (x << 11);
        x = y;
        y = z;
        z = w;
        w = (w ^ (w >> 19)) ^ (t ^ (t >> 8));
        w
    }
}

fn main() {
    input! {
        seed: u32,
    }

    const SIZE: usize = 10_000_001;
    let k = SIZE / 2;

    let mut lo: i64 = 0;
    let mut hi: i64 = u32::MAX as i64;
    let mut res = hi;
    while lo <= hi {
        let m = lo.midpoint(hi);
        let cnt = std::iter::repeat_with(generate(seed))
            .take(SIZE)
            .filter(|&x| x as i64 <= m)
            .count();

        if cnt > k {
            hi = m - 1;
            res = res.min(m);
        } else {
            lo = m + 1;
        }
    }

    println!("{}", res);
}