Submission #64523689

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#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
#define rep(i,n) for(ll i=0; i<n; i++)
#define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define rrep(i,n) for(ll i=n-1; i>=0; i--)
#define fi first
#define se second
#define pcnt __builtin_popcountll
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> Pii;
typedef pair<ll,ll> Pll;
typedef pair<ll,Pll> PlP;
template<class T, class S> void cmin(T &a, const S &b) { if (a > b)a = b; }
template<class T, class S> void cmax(T &a, const S &b) { if (a < b)a = b; }
template<class A>void PR(A a,ll n){rep(i,n){if(i)cout<<' ';cout<<a[i];}cout << "\n";}
template<typename T> void drop(const T &x){cout<<x<<endl;exit(0);}
string zero_padding(int val, int nf){ ostringstream sout;sout << setfill('0') << setw(nf) << val; return sout.str();};
const ld eps = 1e-10;
 
 
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#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
#define rep(i,n) for(ll i=0; i<n; i++)
#define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define rrep(i,n) for(ll i=n-1; i>=0; i--)
#define fi first
#define se second
#define pcnt __builtin_popcountll
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> Pii;
typedef pair<ll,ll> Pll;
typedef pair<ll,Pll> PlP;
template<class T, class S> void cmin(T &a, const S &b) { if (a > b)a = b; }
template<class T, class S> void cmax(T &a, const S &b) { if (a < b)a = b; }
template<class A>void PR(A a,ll n){rep(i,n){if(i)cout<<' ';cout<<a[i];}cout << "\n";}
template<typename T> void drop(const T &x){cout<<x<<endl;exit(0);}
string zero_padding(int val, int nf){ ostringstream sout;sout << setfill('0') << setw(nf) << val; return sout.str();};
const ld eps = 1e-10;
const ll INF = 1e18; 
ull mo = 1000000007;
ld PI=asin(1)*2;
//using namespace atcoder;

int main(){
    ll N;
    cin >> N;
    ll ans = 0;
    REP(a,1,3){
        ll t = 1;
        rep(_, a) t *= 2;
        ll ng = 1e9;
        ll ok = 0;
        while(ng - ok > 1){
            ll wj = (ok + ng)/2;
            auto check = [&](ll b){
                if(b * b > 1e18/t) return false;
                ll res = b*b*t;
                return res <= N;
            };
            if(check(wj)) ok = wj;
            else ng = wj;
        }
        // cout << t << " " << ok << endl;
        ans += ok;
    }
    cout << ans << endl;
}

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