public static void main ( String [ ] args ) {
  int [ ] arr = {
    2 , 7 , 5 , 3 , 8 , 4 , 1 , 9 };
    int n = arr . length ;
    int a = 8 , b = 16 ;
    System . out . println ( "" + countTriplets ( arr , n , a , b ) ) ;
  }
  
public static void main ( String [ ] args ) { int [ ] arr = { 2 , 7 , 5 , 3 , 8 , 4 , 1 , 9 } ; int n = arr . length ; int a = 8 , b = 16 ; System . out . println ( " " + countTriplets ( arr , n , a , b ) ) ; }
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