/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	static int array(int[] arr){
		int sum=1;
		for(int i=0 ; i<arr.length ; i++){
			sum*=arr[i];
		}
		return sum;
	}
	public static void main (String[] args) throws java.lang.Exception
	{
		int[] arr = {1,2,4,5,5};
		System.out.println(array(arr));
 
	}
}

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