#include <iostream>
#include <string>
#include <algorithm>
int main(){
  long long n;

  std::cin >> n;

std::string ans;

  if(n == 0){
std::cout << 0 << std::endl;
return 0;
}
  while(n != 0){    
ans += std::to_string(n % 7 );
   n /=7;
  }
std::reverse(ans.begin(), ans.end());
std::cout << ans << std::endl;
return 0;
}