#include <bits/stdc++.h>
//#include <atcoder/all>
//using namespace atcoder;
using namespace std;

#pragma region Macros
using ll = long long;
#define int ll
using pii = pair<int, int>;
using tiii = tuple<int, int, int>;
template<class T = int> using V = vector<T>;
template<class T = int> using VV = V<V<T>>;
#define IOS\
    ios::sync_with_stdio(false);\
    cin.tie(0);\
    cout.tie(0);
#define FOR(i,l,r) for(int i=(l);i<int(r);++i)
#define REP(i,n) FOR(i,0,n)
#define REPS(i,n) FOR(i,1,n+1)
#define RFOR(i,l,r) for(int i=(l);i>=int(r);--i)
#define RREP(i,n) RFOR(i,n-1,0)
#define RREPS(i,n) RFOR(i,n,1)
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(),(x).end()
#define SORT(name) sort(name.begin(), name.end())
#define RSORT(name)\
    SORT(name);\
    reverse(all(name));
#define ZERO(p) memset(p, 0, sizeof(p))
#define MINUS(p) memset(p, -1, sizeof(p))
inline void Yes(bool b = true) {cout << (b ? "Yes" : "No") << '\n';}
inline void YES(bool b = true) {cout << (b ? "YES" : "NO") << '\n';}
template <class T> inline void print(T x){ cout << x << '\n';}
template<typename T1,typename T2> inline void chmin(T1 &a, T2 b){ if(a > b) a = b; }
template<typename T1,typename T2> inline void chmax(T1 &a, T2 b){ if(a < b) a = b; }

const ll LLINF = (1LL<<62);
const int INF = (1LL<<30);
const double DINF = std::numeric_limits<double>::infinity();
#pragma endregion

const int MOD = 1000000007;

#if 1
#  define DBG(fmt, ...) printf(fmt, ##__VA_ARGS__)
#else
#  define DBG(fmt, ...)
#endif

const int MAX_N = 100010;

int D;

bool Check(int x) {
    int cur = 0;
    while(x > 0) {
        cur += x;
        if(cur == D) { return true; }
        x /= 2;
    }
    return false;
}

int GetDist(int x, int k) {
    int cur = 0;
    REP(i, k) {
        cur += x;
        x /= 2;
    }
    return cur;
}

signed main() {
    IOS;

    cin >> D;

    // x 回はねたことにする
    int ans = LLINF;
    for(int x = 0; x < 63; ++x) {
        int lb = 0, ub = D;
        while(ub - lb > 1) {
            int mid = (ub + lb) / 2;
            int val = GetDist(mid, x);
            if(val == D) {
                chmin(ans, mid);
                ub = mid;
            }
            else if(val < D) {
                lb = mid;
            }
            else {
                ub = mid;
            }
        }
        if(Check(lb)) { chmin(ans, lb); }
        if(Check(ub)) { chmin(ans, ub); }
    }

    print(ans);

    return 0;
}