#include <iostream> #include <algorithm> #include <vector> #include <string> #include <map> #include <set> #include <fstream> #include <cmath> #include <stack> #include <queue> #include <iomanip> #include <bitset> using namespace std; int main(){ int n;cin>>n; int day = 1; while(n!=0){ if(day%7==0) n+=6; n--; day++; } cout << day-1 << endl; }