/* 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
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int count = 20;
		int[] numbers = new int[count];
 
		for (int j = 0; j < count; ++j) {
			if (j == 0) {
				numbers[j] = (count - j) * 1;
			}
 
			numbers[j] = (count - j) * j;
			System.out.println(j + ": " + count);
		}
	}
}

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