/* 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 a[] = { 0, 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18, 20, 21, 23 };
		printMissing(a);
	}
 
    public static void printMissing(int[] array) {
 
        final int lastNum = array[array.length-1];
        final int firstNum = array[0];
        int pos = 0;
 
		System.out.println("These are missing: ");
        for (int i = firstNum; i < lastNum; ++i) {
            if(array[pos] != i){
                System.out.println(i);
            }else {
	            pos++;
            }
        }
    }
}

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