import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        System.out.println("Hello world!");
    // maximum, minimum in array 
        int[] arr2 = {24,4,67,89};
        int max =0;
        int max2 =0;
        int min=0;
  
  
          for (int elmnt :arr2)
         {
             if (elmnt>max)
             max = elmnt;
        
             if (elmnt<max)
             min=elmnt;
        
         }
         for (int elmnt :arr2)
         {
                if (  elmnt>max2&&elmnt!=max)
             max2 = elmnt;
         }
            System.out.println("max num is \n"+max);
           System.out.println("2nd max num is \n"+max2);
           System.out.println("minimum num is \n"+min);
   
   
   // new prac2
      System.out.println("next greater element");
      int [] arr3 = {4,8,12,16,20};

   
         int lent= arr3.length;
         int great = arr3[2]-arr3[1];
   
   
         System.out.println(arr3[lent-1]+great);
         
         
    //
   
   
   
   
   
   
   
   
    }
}