#include <bits/stdc++.h>

using namespace std;
int n, s = 0;
int main() {
    cin >> n;
    for (int i = n; i >= 1; i--) {
        if (n % i == 0) {
            if (i % 2 != 0) {
                s = i;
                break;
            }
        }
    }
    cout << s;
    return 0;
}

\begin{array}{c}\color{#003366}{L}\color{#005A9C}{T}\color{#007ACC}{T}\color{#00AEEF}{K}\color{#00CFFF}{a}\color{#A4D3EE}{n}\color{#D3D3D3}{t}\color{#E0E0E0}{o}\end{array}