public static int countTripletsLessThan ( int [ ] arr , int n , int val ) {
  Arrays . sort ( arr ) ;
  int ans = 0 ;
  int j , k ;
  int sum ;
  for ( int i = 0 ;
  i < n - 2 ;
  i ++ ) {
    j = i + 1 ;
    k = n - 1 ;
    while ( j != k ) {
      sum = arr [ i ] + arr [ j ] + arr [ k ] ;
      if ( sum > val ) k -- ;
      else {
        ans += ( k - j ) ;
        j ++ ;
      }
    }
  }
  return ans ;
}

public static int countTripletsLessThan ( int [ ] arr , int n , int val ) { Arrays . sort ( arr ) ; int ans = 0 ; int j , k ; int sum ; for ( int i = 0 ; i < n - 2 ; i ++ ) { j = i + 1 ; k = n - 1 ; while ( j != k ) { sum = arr [ i ] + arr [ j ] + arr [ k ] ; if ( sum > val ) k -- ; else { ans += ( k - j ) ; j ++ ; } } } return ans ; }
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