#![allow(dead_code)]
#![allow(non_snake_case)]

macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let mut s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};

    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };

    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };

    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };

    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };

    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}

fn main() {
    input!{
        seed: u32
    }
    let mut lo: u64 = 1500000000;
    let mut hi: u64 = 3500000000;
    while hi - lo > 1 {
        let mid = ((hi + lo) / 2) as u32;
        let mut x = seed;
        let mut y = 1;
        let mut z = 2;
        let mut w = 3;
        let mut cnt = 0;
        for _ in 0..10000001 {
            let t = x ^ (x << 11);
            x = y;
            y = z;
            z = w;
            w = w ^ (w >> 19) ^ t ^ (t >> 8);
            if w <= mid {
                cnt += 1;
            }
        }
        if cnt > 5000000 {
            hi = mid as u64;
        } else {
            lo = mid as u64;
        }
    }
    println!("{}", hi);
}