int n,c=0;
scanf("%d",&n);
do{
   n=n/10;
   c++;
}while(n!=0);
printf("%d",c);

int main() {
  int n;
  int begin, end;
  scanf(" %n%d%n", &begin, &n, &end);
  printf("%0*d",end-begin, n);
  return 0;
}

0000
0000