#include <iostream>

using namespace std;

int n, N, m, mx = 1, t;

int main()
{
    cin >> n;
    N = n;
    while (mx <= N) mx<<=1;
    while (n != N || !t){
        m = max(m, n);
        n<<=1;
        if (mx & n) n |= 1;
        n %= mx;
        t++;
    }
    cout << m;
    return 0;
}