#include<cstdio>

unsigned long long int in, ans = 0, cal, l = 1;

int main(){
  scanf("%lld", &in);
  do{
    cal = (in % 7);
    in /= 7;
    ans += cal * l;
    l *= 10;
  }while(in >= 7);

  ans += in * l;

  printf("%lld", ans);

}