#include<stdio.h>
int main()
{
  int n;
  
   if(n=0);
  printf("%s","Tree is empty");
  printf("%s","full");
  printf("%s","Invalid Input");
  }
 for(n=0;n<10;n++);
 
printf("%d\n",enter the number representing keys,n);

 return 0;
  }