#include <iostream>

 #include <algorithm>

 #include <cmath>

 #include <string>

 #include <cstring>

 using namespace std;

 int n,sum;

 int main()

 {

     while(cin>>n){

         n/=;

         sum=;

         if(n>=){

             sum+=(n/)*;

             n%=;

         }

         if(n>=){

             sum+=(n/)*;

             n%=;

         }

         sum+=n;

         cout<<sum<<endl;

     }

     return ;

 }