corejava-programming: Miracle Cubes-30 min

import java.util.Scanner;

public class MiracleCubes {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int total=input.nextInt();
int count=0;
for(int i=0;i<total;i++){
if(isMiracleCube(input.nextInt())){
count++;
}
}
System.out.println(count);
}
public static boolean isMiracleCube(Integer num){
double cbrt=Math.cbrt(num);
double total=0;
for(int i=0;i<num.toString().length();i++){
total=total+Double.parseDouble(Character.toString(num.toString().charAt(i)));
}
if(cbrt==total)
return true;
else
return false;
}
}

import java.util.Scanner;
import java.lang.*;
class miracle
{
public static void main(String[] args)
{
Scanner in=new Scanner(System.in);
int n=in.nextInt();
int c=0,m=0;
if(n>0 && n<=50)
{
int []a=new int[n];
for(int i=0;i<n;i++)
{
int sum=0,sum1=0;
a[i]=in.nextInt();
sum1=a[i];
if(a[i]>0 && Math.pow(a[i],3)<Math.pow(10,5))
{
sum=sum+a[i]%10;
a[i]=a[i]/10;
}
else{
c++;
}
}
if(c>0)
{
System.out.println(c);
}
}
else{
System.out.print("Invalid input");
}
}
}