#include <bits/stdc++.h>

using namespace std;
int n;
queue<int> q;
int cnt;
int main() {
    cin >> n;
    for (int i = 1; i <= n; i++) q.push(i);
    while (q.size() > 1) {
        int t = q.front();
        q.pop();
        cnt++;
        if (cnt == 3) cnt = 0;
        else  q.push(t);
    }
    cout << q.front();
    return 0;
}