static void printSeriesSum ( int N ) {
  double sum = 0 ;
  int a = 1 ;
  int cnt = 0 ;
  boolean flag = true ;
  sum += a ;
  while ( cnt < N ) {
    int nextElement ;
    if ( flag == true ) {
      nextElement = a * 2 ;
      sum += nextElement ;
      flag = ! flag ;
    }
    else {
      nextElement = a * 3 / 2 ;
      sum += nextElement ;
      flag = ! flag ;
    }
    a = nextElement ;
    cnt ++ ;
  }
  System . out . println ( sum ) ;
}

static void printSeriesSum ( int N ) { double sum = 0 ; int a = 1 ; int cnt = 0 ; boolean flag = true ; sum += a ; while ( cnt < N ) { int nextElement ; if ( flag == true ) { nextElement = a * 2 ; sum += nextElement ; flag = ! flag ; } else { nextElement = a * 3 / 2 ; sum += nextElement ; flag = ! flag ; } a = nextElement ; cnt ++ ; } System . out . println ( sum ) ; }
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