#include <stdio.h>
int main(){
  long in;
  int i,out[1000000000000];
  scanf("%ld\n",&in);
  for(i=0;in>6;i++){
    out[i]=in%7;
    in/=7;
  }
  out[i]=in;
  while(i>=0){
    printf("%d",out[i]);
    i--;
  }
  printf("\n");
  return 0;
}