#include <stdio.h>
#include <string.h>
#include <math.h>

int HEX_TO_DEC(char st[10])
{
  int i, s, k, p;
  s = 0;
  p = strlen(st)-1;
  for (i = 0; p>=0; i++, p--)
  {
    k=toupper(st[i]);
    s+=((k>='A')?10+k-'A':k-'0')*pow(16,p);
  }
  return s;
}

int main()
{
  char st[10];
  scanf ("%s",  &st) ;
  printf ("Result: %d\n",HEX_TO_DEC(st));
  return 0; 
}