Consider the following program:
void A(int n){
printf("*");
if(n>1){
A(n/4);
A(n/4);
A(n/4);
A(n/4);
}
}
Let $X$ be number of asterisks printed by above function when $n=1024.$ Then the value of $X$ will be ____________
How ans will be $\frac{4^{k+1}-1}{3}$ , where $k=5?$ .