#include <stdio.h>
 
int main ()
 
{
 
        int num1, base8, x, y, n, lastDigit;
 
        printf("Enter an integer in base 8: ");
        scanf("%d", &num1);
 
        num1 %10 =lastDigit;
 
        n = 1;
        x=num1
 
        if(num1 > 10){
        x/10 = x;
        x %10 =y;
 
        while (x != y) {
 
        x/10 = x;
        x %10 =y;
        base8 = y*8^n
        n = n + 1;   
        }}
        sum= base8+lastDigit;
        printf("%d", sum);
 
return 0;
 
}

#include <stdio.h>
 
int main ( void )
{
  int number;
 
  scanf ( "%o", &number );
  printf ( "%d\n", number );
 
  return 0;
}