#include <iostream>
#include <vector>

int main() {
  int n;
  std::vector<int> seven;
  std::cin >> n;
  do {
    int t;
    t = n % 7;
    seven.push_back(t);
    n /= 7;
  } while (n);
  for (auto itr = seven.end() - 1; itr != seven.begin()-1; itr--) {
    std::cout << *itr;
  }
  std::cout << std::endl;
  return 0;
}