#pragma GCC optimize "trapv"
#include<bits/stdc++.h>
#define faster ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
using namespace std;
//long long f[1000000001]={0};
map <long long int,long long int> f;

long long maxi (long long n)
{
     auto itr=f.find(n);
     if (itr!=f.end()) return itr->second;
     if (n<=11)
         f.insert(pair<int,int>(n,n));
     else
          f.insert(pair <int,int>(n,max(maxi(n/2)+maxi(n/3)+maxi(n/4),n)));
     //return f[n];
     return (f.find(n))->second;
}

signed main()
{
   faster;
   #ifndef ONLINE_JUDGE
     freopen("ip.txt", "r", stdin);
     freopen("op.txt", "w", stdout);
   #endif
      long long n;
     //int t;cin>>t;
     while(cin>>n)
     {
          cout<<maxi(n)<<endl;
     }
}